can be used as sarcasm for a terrible day, or series of events.
i woke up late, my car broke down, and i got fired. i'm having a good time.
Laying back on the couch, with your girlfriend or best buds, enjoying a large greasy pizza and cold michelob light, while watching a good movie on the tube.
"We just sat in the room and drank beer, ate pizza, watched a movie; you know, a good time."
stuff that goes on after marriage.
Mel and Calvin after getting married will have a good time.
having a good meal, some good drinks, and getting laid on the same night. (when your favortie football team wins the super bowl)
we had a good time