1. Nut & Bolt Valentine's Day Mixer | District, Boston

Dudes are presented with a nut at the door, ladies a bolt. (The idea being that for every nut there is a matching bolt. Or, you know, if you don't like his nuts, ladies, better bolt.) Mix, mingle, and try to find yourself a perfect fit. Aside from tool-toting singles, this party also has small bites and cocktails to keep you fortified and lubricated as you search for Mr.