night on the town
A night of celebrations or revelry in various places (typically restaurants, bars, clubs, etc.) that a particular town or city has to offer. We were out for a night on the town last night to celebrate Valerie's birthday. That's why we're all so exhausted today. I had a night on the town with my closest friends from school last weekend.
night on the town
a night of celebrating (at one or more places in a town). Did you enjoy your night on the town? After we got the contract signed, we celebrated with a night on the town.