I personally loved it because I like kids. You were totally free to do whatever you wanted, usually. Under-staffing causes a lot of issues. I watched many coworkers get away with many things that the YMCA didn't stand for but the program couldn't really do anything about because there wasn't enough counselors. Its honestly a hard job, but my saying is "someone has to do it." If you like kids, please please work here and try to set an example for your coworkers. The YMCA had a fantastic vision for a fantastic program but needs more organization and more funding (to pay higher wages so workers want to compete for this job). As a counselor you watch after anywhere from 10-30 kids, give them snacks and keep them occupied. If you are in a good school, and you teach the kids to respect you, you can help the kids learn something, play games and do homework. If you don't care or get a bad school with a bad "manager" the best you can do is keep track of them and keep them alive. Be brave!
Good place to start if you want to work with kids