It's rude to ditch your friends to go clubbing.
Bob and his friends made a date to see a movie tonight, but he just saw a girl, Jessica, at the club he is at.
Bob wants to go out with Jessica.
Bob gets Jessica's number, so he can call her after the movie is over.
Bob goes clubbing with Jessica and leaves his friends behind.
Bob gets to spend time with his friend and also go out with Jessica.
Bob's friends stop hanging out with him and stop inviting him to their activities.