a night out
An evening spent having an enjoyable time away from home, as in a restaurant, theater, bar, or other such locations. I never knew how much I would miss being able to have a night out once we had kids. Hey John, some people in the office are planning a night out this Friday. Would you like to join us?
work nights
To work in the evenings, as opposed to during the day. I used to work nights, but it took such a toll on my sleeping that I switched back to the day shift.
stag night
A groom's outing with his male friends before his wedding; a bachelor party. Mark knew that his stag night had gotten out of control when the police arrived.