a spot that is open late at night and that provides entertainment (as singers or dancers) as well as dancing and food and drink
"don't expect a good meal at a cabaret"
"the gossip columnist got his information by visiting nightclubs every night"
"he played the drums at a jazz club"
A public or private establishment that is open late at night to provide entertainment, food, drink, music and/or dancing.
"After closing the office early, we decided to head downtown to a famous nightclub where we could enjoy live jazz and dance until dawn."
To visit a nightclub (or nightclubs) for entertainment.
"We spent last Saturday at the downtown nightclub dancing until sunrise."