Zakynthos island is famous for its wild nightlife, particularly in the region of Laganas. Many all-night bars and clubs are located in Laganas, a British-frequented resort on the southern side of the island, and things often get extreme. Things in the rest of the island are more lounge, with nice bars in Zakynthos Town and also in Tsilivi, Alykes, Argassi, and other tourist places. These lounge bars usually stay open until 2 or 3 o'clock in the morning.
For a more peaceful night out, you can try a long dinner in the many restaurants all around the island. In Zakynthos, you can find from ethnic restaurants to traditional taverns by the sea and in the mountainous villages.