On-Again Katy Perry and John Mayer Double Date with Allison Williams and Her Fiancé

Katy Perry and John Mayer Back Together 2015
John Mayer and Katy Perry
Charley Gallay/Getty

01/11/2015 AT 03:10 PM EST

Katy Perry and John Mayer are back on.

Perry, 30, and Mayer, 37, shared a double date with Girls star Allison Williams and her fiancé Ricky Van Veen Saturday night at the Chateau Marmont in Hollywood.

Perry and Williams met up first, spending much of the evening chatting and laughing on the back patio over two rounds of drinks.

They were joined later by Van Veen and then Mayer, who arrived under a large brimmed hat and greeted Perry with a kiss. The two singers held hands at the table and continued the PDA when they left around 11:15 p.m., standing hand-in-hand in the lobby before heading out.

It was the second consecutive weekend the couple had been spotted out together since their breakup last February.

"They actually buried the hatchet a while back, and they are friends," a Perry source told PEOPLE recently.

These days, the source added, Perry "is focused on her career and making herself happy."

All the details on Perry and Mayer's renewed romance

MORE ON: John Mayer , Katy Perry
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