hipsters are suburban kids from Williamsburg, VA who move to New York and affect an urban-authentic posture. they are braindead.
the hookah smoking guy with IBS (i'm not sure how a chronic marijuana smoker could read 2 pages of Deleuze, or Kojeve, or Lacan, or any of the other alleged offenders) - there was a kid like this in my Popular Culture course. He knew everything there is to know about heavy metal music and rare 1970's SF films.
and role playing games like Dungeons and Dragons. he wasn't what i'd call pretentious, but he knew more than the other students, and liked to show off in class discussions.
pretentious crap:
wearing golf clothes to a bar or club
saying you are a lawyer, or attending law school
popping your collar
being white, over-educated, "hip" and listening to hip hop, grime, dubstep, dance or raggae music