Fitness Formula, Lakeview

The impressive Fitness Formula Halsted (3228 N. Halsted St., 773-755-3232), a gay-popular outpost of the upscale Chicago health club chain, has some of the finest facilities of any gym in the city - it's also open 24 hours during the week, and until 9 pm on weekends. It's steps from many of the city's trendiest gay bars and restaurants (Sidetrack, Cocktail, Minibar), in the heart of Boystown in Halsted. Non-members may work out here for a fee (which is reduced if you're a member of a health club that's part of International Health, Racquet and Sportsclub Association (IHRSA).