When I was in college at The College of Charleston in South Carolina I did 2 things to make money part time. I taught aerobics for LifeQuest (if you live in Charleston I know I am dating myself here) and I DJ'ed for a mobile DJ company. I would go to weddings, barmitzvas, family reunions, etc. and play the music. It was a super fun job, one that I continued even while living 2 hours away in Columbia.
Now that I have 2 kids, a husband, a full time job, teaching a few times a week, and this website to keep me busy I find myself unable to DJ anymore. But I dearly loved doing it, it pays great money, and the company I worked for was awesome.
I still keep in touch with my old boss and I know that he is always looking for great talent. I think that aerobics instructors naturally make great wedding DJs - we are leaders, we love music, we are super fun, and we already know how to handle a microphone. Plus we aren't afraid to get out there and teach a line dance or two if the party is faltering.
If you think this sounds like it might be fun, and you are interested in earning over $100 to go to weddings and play music, please email me (make sure to note that you are emailing about this post in the comments box). I will be happy to put you in touch with my old boss, and I know he would love to talk to you.