Woot! I went back today and got a chance to wander around when basically no one else was using the gym, and messed around in the bouldering cave a bit. There are a couple of vertical routes--I don't think I actually did the marked route but I did manage to climb up the wall far enough to smack my hand against the top. \o/

I also, just to see how it went, pulled myself up to an overhang and clung there for a couple of seconds. I ... am gonna have to work up to that. :)