Katy Perry on Double Date With John Mayer, Alison 'Peter Pan' Williams — And Another Guy

Katy Perry was spotted on a double date Saturday night at Hollywood's chi-chi Chateau Marmont hotel patio bar and restaurant. But the news came out of the evening over cocktails, which in itself was not unusual, was the gentleman who joined the "Teenage Dream" singer midway through the evening -- her old flame, singer-songwriter John Mayer.

Mayer and Perry -- whose real name is Katheryn Hudson -- entered into a romantic relationship in 2012, shortly after the collapse of Perry's brief marriage to comedian and social critic Russell Brand.

Perry, now 30, and Mayer, 37, broke up the following year, but as the Inquisitr earlier reported, the on-again, off-again couple appear to have entered another "on-again" phase. Though sources close to Katy Perry have scoffed at speculation that the "I Kissed A Girl" songstress and Mayer had reignited their relationship -- despite reports that the duo were engaging in "all night sex romps" in Perry's Los Angeles home, and at the house of a friend there.

In 2013, Mayer and Katy Perry were seen on at least two double dates -- including at that year's Grammy Awards -- with Alison Williams, who recently played the title role in a televised production of the musical Peter Pan, and her fiancé, College Humor website founder Ricky Van Veen.

The Saturday double date at the Chateau Marmont was blast from the past, as the same two couples reunited for an evening out at one of Hollywood's swankiest spots.

According to a People Magazine eyewitness account, Perry and Williams spent the first part of the evening quaffing cocktails and giggling, with Mayer -- oddly wearing a wide-brimmed hat -- and Van Veen joining the festivities later.

Mayer and Perry were seen kissing and holding hands, leading observers to believe that the two are in fact "officially" dating once again. The maybe-maybe-not-a-couple were also spotted out on the town together the previous weekend.

"They actually buried the hatchet a while back, and they are friends," one insider told People, adding that Katy Perry, who will headline the NFL Super Bowl halftime show on February 1, is not seeking a relationship at the present time, but instead "is focused on her career and making herself happy."

The same is not true, however, of her gal pal Allison Williams. One of the stars of HBO's low-rated but widely discussed sitcom Girls, Williams became engaged to Van Veen last February and announced that she was willing to "walk away" from her career in order to become a wife and mom.

Of course, Williams may not actually need a career, given that her father, NBC News anchor Brian Williams, collects an annual salary of $13 million for reading the newswire and has a reported net worth of $40 million.

Whether the double date with Williams and Van Veen influences Katy Perry to change her approach to her career-relationship balance remains to be seen.