Plectrum by Ben Sherman Melton Crombie in Graphite Grey
Buy It Now at Ben Sherman, $269

Throw this on over your tux and suit jacket, and keep in mind that if you take someone home, it might end up over their shoulders by the night's end. That in mind, try not to stow valuables in the pockets in case it gets lost in the coat check or due to drunkenness. But if you happen have a beauty like this melton crombie from Ben Sherman, we think you'll probably want to hang onto it for as long as possible. These also make a great impromptu blanket if you and your newfound frisky friend just drunkenly make out in a cab.