I belong to the rec center at a nearby university. It's a beautiful, well-maintained facility and I make use of the free spinning classes, swimming pool, equipment room, and indoor track. I've found spinning to be a lot more of a workout than my typical cycling since there are no downhills and some of the exercises are not "natural" cycling things (mainly the "jumps" where you stand up and sit back down at 2 to 8-second intervals).

Generally the mid-morning spinning class is mostly other 40+ people, but yesterday a few students actually showed up. I ended up next to a coed who was wearing very short shorts, and then she proceeded to strip off a couple of upper layers as we started getting warmed up. Of course, I tried not to notice (ha!), but it was tough (especially since we face a wall-sized mirror in the spinning room!). By the way, I've observed that people our age are totally invisible to the college-age kids -- they actually get startled if you so much as say "good morning!" to them.