They went to the city to whoop it up all night.
whoop it up
idiomTo have a great time; to party or revel whole-heartedly or noisily.
After finishing their final exams, the students decided to go out and whoop it up at the local club.
Following the team's unexpected championship victory, the fans poured into the streets to whoop it up in a wild, jubilant celebration that lasted until dawn.