Distinguishing features: Furrowed eyebrow; ill-fitting button-up; flagrant erection 

There are dudes who will go to a bar, get drunk, and spend the remainder of the evening indiscriminately humping unguarded butts on the dance floor. Tape worms in keg lines notwithstanding, The Step-Back-You're-Dancing-Kind-of-Close Guy is the bar's biggest nuisance.