A man walks into a nightclub with a beautiful girl on his arm. The show begins and the comedian comes out for his first show of the evening. The comedian says ""A man walks into a nightclub with a beautiful girl on his arm. The show begins and the comedian comes out for his second show of the evening.. The show begins and the comedian says ""A man walks into a nightclub with a beautiful girl on his arm"". Just then a man in the front row stands up and says ""I think I've heard this before"". The…