It's just a warning sign, he adds, and often, those men will be let in if they are behaving themselves at the door. "If our bouncers talk to them for just two minutes, and say, how are you, what are you up to, where else have you been, etc, it soon becomes obvious whether they are likely to cause hassle inside or not. If one of them responds with, 'for f**** sake mate, just let us in', for example, you know you're dealing with trouble. If they respond well to the questions, they'll have no problem."