Giving back doesn't have to leave you broke. Also giving back doesn't have to cost you an arm and a leg to make a difference. One of my favorite event and charity websites is NewYorkSocialDiary.com. Here is an article I wrote about upcoming events and past events that were actually free to attend.
I would rather go to an event, than to the club again. I like to learn, see something new, affect someone, and this website is very handy for things like that.