Can non-Princeton students get in parties?

My friends and I are visiting Princeton soon. We want to go to an eating club or frat party, but are unsure of how to do so. Do all parties require Princeton IDs or are there parties that anyone can get in?

An eating club is just basically a large house (ie mansion). So if you walk in the front door, you’ll stumble upon a bunch of people that don’t know you. If there is a Princeton student that you know, he/she might be able to talk to the eating club members and let you in.