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.

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

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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.