Money Issues

I'm going out with my whole class tonight but I have a problem. I'm not too sure what I'm going to do about it. Basically, I'm living off my credit card right now, which is fine because I get paid on Friday. Usually I can take cash out with my card but it's not working at all. Which would be fine if we were going to somewhere I could pay by credit. And I looked at my moms bank account and she doesn't have enough money to lend me any. sucks.