when people go from bar to bar in a strip of bars in the same vicinity. as long as you have the stamp on your hand from the first bar you went to, you are allowed to get into the other bars for free. make sure you know your bars' bar crawl rules and shit though
dude 1: bro this bar sucks lets go to the one across the street!
dude 2: nah dude im broke i dont want to pay another $10 to get in.
dude 3: no dumbass bar crawl is in effect we'll get in free if we show them the stamps on our hand.