Caught in the Act!

05/06/2011 at 06:00 AM EDT

Celeb Sightings: Zac Efron, Joe Jonas, Chord Overstreet, Emma Roberts
Zac Efron and Joe Jonas
Johns PkI/Splash News Online
Zac Efron and Joe Jonas – and their entourages – shared a prime table during a vaudeville-inspired performance by Beacher's Madhouse at the Hollywood Roosevelt Hotel. The guys greeted each other, then basically stuck to themselves and their own group of friends. Jonas sipped a cocktail with his pals – and occasionally snapped pictures with his phone. The show's producer David Arquette worked the room, walking around and making sure that everyone was being taken care of.

• Are things heating up between Glee's Chord Overstreet and Emma Roberts? The duo spent more time together at the Nylon magazine Young Hollywood issue party at Bardot in Hollywood. Roberts hosted the event, which drew out other Glee stars like Kevin McHale and Jenna Ushkowitz, as well as Paris Hilton. Roberts playfully touched Overstreet's arm while the group was standing in a circle, but otherwise dialed down the PDA. She also seemed to get along well with Ushkowitz, and the two shared some girl talk.

Lindsay Lohan was in high spirits during her low-key dinner with sister Ali and two friends on the patio at West Hollywood's Chateau Marmont. The starlet ate salad and drank soda, and seemed to be listening intently to the conversation at her table. Lohan also flipped through her BlackBerry, and later, greeted some friends with a big smile and animated hello.

• No Amanda Seyfried? Ryan Phillippe was spotted eating lunch – solo – at Comme Ça in L.A. "He seemed to be enjoying himself at lunch," an onlooker says. "But he was pretty mellow."


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