busser = guy who picks up empty (most of the time

) glasses and bottles
barback = guy who brings beer, glassware and ice to the bar while the bar is in operation
the busser job involves holding a bin over your head and getting through the crowd.
the barback job of carrying glassware and beer is a real bitch because the drunk people just dont move! At least once a night i'll bump into someone when im carrying like 2 or 3 cases and theyll drop their drink, this iws why you should hold your drink tight in your hands at a club