I've been looking through the idiom dictionary a bit looking for some fun idioms for partying like "paint the town" but I can't seem to find any, any help in this area would be greatly appreciated
Here are a few party related idioms that spring to mind:
to go out on the tiles
to make a night of it
to be a party pooper
to be the life and soul of the party
There are lots more, but quite a few of them are alcohol-related!