Christmas party ideas for at least 70 people?

Help! I'm 13 and I'm hosting a Christmas party (my first time doing it). Do you think my guests (around 12-14 years old) would enjoy it at a restaurant in Sudbury, MA called Bullfinches? There will be dancing, socializing, a Yankee Swap and a dinner. It's supposed to be a little formal, but the atmosphere is laid-back and fun. Also, if you have any other ideas or suggestions, please let me know. (maybe the limbo?) Thanks!