Nightclub is a lot assignment in The Sims 4. Nightclubs, as their name suggests, are more active at night. They differ from the bar and the lounge in that Sims tend to dance more than they drink or chat. There is only one pre-made nightclub in the base game, but more can be created or imported through the Gallery.
If the player owns The Sims 4: Bowling Night Stuff and places a bowling lane on a nightclub, other Sims will come to the nightclub specifically to bowl, in addition to the other behavior on the lot. This also works for Bars and Lounges.
Discothèque Pan Europa is a modern nightclub in the neighborhood of Lykke Centre in Windenburg. It's a giant modern building where Sims can order drinks or practice their Mixology skill. There is also a DJ booth, where Sims can dance and practice their DJing skill. It is also the club hangout of the Spin Masters.
Narwhal Arms is a traditional nightclub in the neighborhood of Olde Platz in Windenburg. Inside it there is graffiti at the wall. It features a DJ booth and a dancefloor. It is also home to the members of Partihaus club.