My roommates and I just had a discussion. I think that between small gatherings, house parties, and fraternity parties, there have to be near 700 parties a year. There are usually a few major parties every weekend (probably 3-4) and often on Tuesday nights (Wednesday is a low-load class day). If you want to party, you can.
That being said, don’t make the story of your career at RPI a semester of partying. If you do it too much, you won’t last long.