The high-rise building I work in has a gym (complete with exercise bikes) that's free for tenants' employees to use, as well as a separate (very expensive) "spin class" business. It also has reasonably-secure covered bike parking.
So I'm in the elevator with a lady who works at some law firm on the floor below mine. She looks me over -- I'm wearing a neon yellow t-shirt, shorts, cycling gloves, cycling shoes and carrying a pannier, so about the only way to make it even more obvious that I'm a cyclist would have been to carry my helmet -- and she asks me if I do the spin class. I resisted the urge to laugh derisively and go off on a tirade about how stupid a concept "spin class" (and especially, paying for it) is, and instead merely said "no, I ride an actual bike."