Elliot Hulse's stretching routine, "bio-energetics", is somewhat alternative but great before training. I must admit I don't do all of these at the gym, heh. Either way, some of these exercises simply feel really great. I think essentially the body will let you know what is healthy/good and what is not. If a stretch feels really good, it's probably because it's healthy for the muscles. In my pull-up bar at home, I usually just hang several times a day because it feels fantastic. I take that as a good sign :)