You should never put drugs in someone's drink
Mark goes out clubbing and meets a girl that he is interested in named Rose.
Mark wants Rose to come home with him.
Mark invites Rose to a nightcap at his place.
Mark spikes Rose's drink so that she is more likely to go home with him.
Rose agrees to go with Mark, and they leave the club together.
A bouncer witnesses Mark's action and kicks him out of the club.