Katy Perry enjoys night out with John Mayer

Katy Perry was spotted partying with John Mayer and 15 other friends at the Chateau Marmont in West Hollywood, on Friday.

A source told the People magazine that the couple and their pals were guided into the far back corner of the hotel's tented patio, where their security staff kept a close eye on them, Contactmusic reported.

Perry, 28, was seen in a short-sleeved white 50's style cashmere sweater and a fitted metallic patterned shirt, while Mayer wore dark shirt under a grey blazer.

The insider further revealed that the pair sat separately at their large table till past midnight.