Nightlife in Kefalonia is not wild but it has some nice lounge venues to enjoy a night out. The most cosmopolitan spot of Kefalonia is Fiscardo, whose waterfront is lined up with fish taverns, nice cafeterias, and bars. A bit outside Fiscardo, there are also a couple of clubs that play loud music. Many bars are also found in Skala and Lassi, two lively resorts with lounge bars. In the central square of Argostoli, there are also bars that stay open till around 2 or 3 o'clock in the morning.
For a more peaceful night out, try the delicious taverns that are found all around Kefalonia. Prefer the seaside taverns for the romantic views. Lourdas beach has some nice romantic taverns as well as many other beaches of the island.