Although the famous nightclubs of Sitges are nearby, Castelldefels also offers top quality nightlife with 15 bars and clubs to choose from, all within walking distance of the Castelldefels Apartel.
According to TripAdvisor these are the top destinations:
Barnabe - Avinguda del Banys, 18
Trivinsvinoteca Tapas and Bar - C/ Dr. Trueta, 36
La Suite - Carrer Cinc