Any ideas for drinks or hors d'oeuvres at our "fancy" party?

My roommate and I have an apartment this year that is wonderful for entertaining. We’ve been meaning to have a party, and finally set a date. As far a ‘theme’ goes, we’d like a reason to really dress up (dresses for women and ties for me) and are encouraging our guests to do so.

So, now we need some suggestions on hors d’oeuvres and drinks that we could serve. Keep in mind that we are still in college, and therefore are not very wealthy.

Also, any ideas on how to title this party on the invitation? It’s not a dinner party, as there will not be dinner… just hors d’oeuvres, and we are considering having some alcohol, but primarily BYOB as this is going to be a large crowd most likely.