One of the city's best-equipped gyms with one of its most gay (and curious) clienteles, this branch of the national Fitness DK chain is housed inside the iconic Radisson Blu Royal Hotel. A big 21,000+ square feet, the gym has modern machines, numerous classes, a sauna, a steam room, massage and beauty treatments, and it's open 6am to 10pm on most weekdays (day passes available). For an even bigger (32,000+ square feet) location, try the branch near Rosenborg Castle at Adelgade 5-7 (www.fitnessdk.dk/centre/adelgade/Pages/Adelgade.aspx).