The large hotels usually have something going on every night. This might be a special meal followed by a Fijian dance show. The large hotels also frequently have live entertainment in their bars during the cocktail hour. Check with any hotel activities desk to see what's happening.
The Martintar area has some of Nadi's most comfortable bars. Always popular is my favorite, The Bounty Bar & Restaurant (tel. 672 0840), which draws many expatriate residents to its sports TV and friendly bar. It resorts to karaoke after 9pm. Across the Queen's Road, the outdoor tables at Ed's Bar (tel. 672 4650) are popular with expats, surfers, and backpackers during the early evening, with locals later. Next door to the Mercure Hotel Nadi, you can dance the night away at Frequency Lounge (tel. 672 6779), which shares a pizza kitchen with Aroma's Cafe.
The cafe at The West's Motor Inn, on the Queen's Road in Martintar (tel. 672 0044), usually becomes a pleasant, gay-friendly piano bar from Monday to Saturday.
Keep an Eye on Your Beer Mug -- Bartenders in Fiji are taught to keep your beer mug full and your pockets empty -- that is, they don't ask if you want another beer, they keep pouring until you tell them emphatically to stop.