He has no intention of taking advantage of a drunk lady and being unable to face her the next day. Instead of a movie, dinner, sex, and never calling back, this date went from drinking to dancing to her inviting him over and him saying that she should get rest instead.
They started from the bottom and the only way from here is up. This has not been the ‘dreamy’ first date most people expect. They end the night with him holding her hair back as she throws up in a back alley. The guy and the girl hits it off at the club, they drink their hearts out and dance the night away.