bouncers dont excist anymore..... they are crowd controllers
they are supposed to be there to keep everyone happy and make sure things run smoothly..... you will always get the odd hero who tries to bluff his way through..... most are genuinly nice people more than willing to assist you.
We have all been maggoted with our mates and need to be settled down on occasions (and even turfed out). Sometimes they make mistakes but generally they dont kick you out unless you have done something wrong.... some places are stricter than others as they can be depending on how busy they are.....
but like every form of life there is always a tool or two to give them a bad rep.
But what it boils down to is that if you are dressed in accordance and behave yourself you wont even know they are there.....