I never used to go to classes before coming to Sweden, but they are so much fun! I find that I can get my HR quite high when working out around other people. I'm glad you're enjoying it. When (right? :)) you come visit Uppsala, I'll take you to come SnyggMagnus gympa!
Yes, I'm a bit fan of using them for the motivation. IT's way better than lifting alone.
you've crossed to the dark side becks