Barwinism  bär-wen-izem (n) 

The ability to adapt one’s manner, behavior, or appearance in order to successfully (and expeditiously) get a bartender’s attention.  In a sentence:  “If you want to get a drink, whatever you do, don’t raise your hand. Just silently nod and look cool. And take off those glasses; he hates anything ‘hipster.’ It’s pure barwinism in here.”  See also:  Survival of the hottest; Natural Light selection; Bro-Magnons