From On the Road to the dance floor!

Kristen Dunst celebrated a friend's birthday at Bootsy Bellows in West Hollywood on Thursday night.

Arriving around 10 p.m., the Bachelorette star glowed in a black dress and high heels as she and friends mixed vodka cocktails in the VIP area.

Dunst disappeared for a few minutes, only to return quickly with her beau Garrett Hedlund, who was dressed comfortably in a T-shirt and jeans. The couple was anything but shy about their affection, sitting closely and sharing quick kisses.

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It's a family affair!

Kimberly Stewart celebrated her 33rd birthday with dad Rod, stepmother Penny Lancaster and brother Sean at Bootsy Bellows in West Hollywood on Friday night.

In a curve-hugging black dress, Kimberly chatted with friends while Rod kept a low profile. The 67-year-old rocker didn't move from his seat when the DJ played his 1978 hit, "Da Ya Think I'm Sexy?"

Benicio del Toro, who has a daughter, Delilah, with Kimberly, also joined the soiree briefly. He arrived with a few pals, wearing a baseball cap.

"The two seemed to be on good terms and got along well," a source tells PEOPLE. "Although he didn't stay for long, clearly he was there to make an appearance for Kimberly."

The festivities wrapped up around 1:15 a.m. when the Stewart family parted ways.

From Twilight to late-night!

Ashley Greene enjoyed a night out with pals at Bootsy Bellows in West Hollywood, Calif., on Tuesday.

Casually dressed in a black t-shirt, jeans and black flats, the Apparition actress kept a low profile throughout the evening as she nestled into a VIP room with friends.

While the DJ spun hit after hit, Greene preferred to keep things quiet, opting for quiet conversation, as she enjoyed vodka cranberry cocktails.

"She stayed until the lights came on just after 2:00 AM," says a source, "And responsibly took a cab home."

No guy, no problem! Katy Perry left rumored beau John Mayer at home Friday night while hitting West Hollywood's Bootsy Bellows. The singer, on hand to celebrate her brother David's birthday, kicked back as his band performed.

Hanging with her friend Markus Molinari and her stylist, Johnny Wujek, Perry "seemed very happy and she was really having fun," an onlooker tells PEOPLE.

Also unwinding at Bootsy Bellows Friday: Leonardo DiCaprio and pal Lukas Haas; venue owner David Arquette; and Glee's Naya Rivera, Chord Overstreet and Kevin McHale.
– Jennifer Garcia

No trouble here! Lindsay Lohan spent a relatively quiet night out with pals at West Hollywood's Bootsy Bellows on Tuesday. The actress – wearing denim short-shorts, a black tank and crystal-studded vest – settled into a banquette in the back VIP room around 1:30 a.m., chatting away with a select group of friends.

According to an onlooker, "Lindsay seemed really mellow and like she just wanted to chill out." In fact, no one else in the hotspot seemed to realize she was there.

At one point in the evening, Lohan turned to face the mirrored wall and reapply her lip gloss. And she did take a break from chatting to watch the lounge's marionette puppets in action. But by 2:30 a.m., the starlet called it a night, grabbing her red Birkin bag and camera and slipping out.

Cheryl Burke recently made headlines for stepping out with new beau Joffrey Lupul, but on Tuesday night, her attention was geared toward another guy.

The Dancing with the Stars pro stepped out with Zac Efron and some other pals at new West Hollywood hot spot Bootsy Bellows.

Efron, wearing in a T-shirt, jeans and a baseball cap, joined a dressed-up Burke and the group in the back VIP room, where they went seemingly unnoticed by fellow club-goers.

"At one point, they went up to get drinks from the bar, and they showed off their dance moves," an onlooker tells PEOPLE. "They ordered a few cocktails to bring back for them and their friends."

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Taking a break from daddy and mommy duty, James and Kimberly Van Der Beek headed out to West Hollywood on Tuesday night to check out a special V.I.P. night at L.A.'s newest nightclub, Bootsy Bellows.

The lovey-dovey duo popped into the venue with a few male pals, and the group was immediately escorted to a private area in the back that was accessible to people with wristbands only.

"They had a table to themselves complete with alcoholic beverages and mixers," an onlooker tells PEOPLE. "The group seemed really close-knit and comfortable with each other. At the beginning of the night, James and Kimberly were sitting next to each other, but as it went on, James scooted over to talk to his guy friends and Kimberly seemed to blend in perfectly with the rest of the group."

Of the happily married pair, the source says they "didn't really show any PDA," but they just "seemed really cozy and happy to be together."

At one point, a woman walked around carrying a bag of candy and light-up plastic rings, and Kimberly went for a sweet treat.

"She took a long gummy worm and started eating it," says the observer. "She made it look very yummy."

The new spot, co-owned by David Arquette – who was also on hand that night, dressed dapper in a suit – opens to the public on June 29.
– Dahvi Shira

David Arquette's latest project is finally about to come full circle.

The Scream star was recently spotted overseeing the completion of his new nightclub, Bootsy Bellows, which is set for a June 29 grand opening in West Hollywood.

"David looked really good and looked like he was in good health," a source tells PEOPLE of the actor, who was seen standing in the new venue's doorway. "He didn't look as skinny as before. He looked like he'd put on a few healthy pounds."

Adds the insider, "At one point, a random person walked by and yelled, 'Lookin' good,' at David."

Of the venue, also co-owned by h.wood group's John Terzian, the source describes it as having "a funky vibe inside."

Taking over the space of former hotspot Trousdale, the spot was frequented by Ryan Phillippe, Ashley Greene, Derek Hough and stars of The Hills.
– Dahvi Shira