Natalie Coughlin & Nathan Adrian Grab Late Night Snack in London
08/08/2012 AT 08:00 PM EDT
Adrian, 23, and Coughlin, 29, were joined by fellow gold medalist Matt Grevers and his fiancée Annie Chandler when they grabbed 3 a.m. kebobs at a London's Ranoush restaurant.
Adrian – who had attended a party with Michael Phelps earlier – was also spotted giving Coughlin a back rub. But even though the two have been seen hanging out in London on multiple occasions, they are just friends: Coughlin is married to California-based swim coach Ethan Hall.
While Adrian won two gold medals at the London Olympics – including an individual gold in the 100m Free – Coughlin (who is also one of PEOPLE'S "12 Hot Female Olympians") won a bronze for participating in a heat of the U.S.'s 4x100 free relay.