Waikiki has some fantastic spots for Halloween costume events with contests and themed parties! Here are a few top choices that cater to a mixed age range:

1. The District Nightclub – Known for its high-energy vibe, The District usually hosts Halloween parties with costume contests and prizes. Expect a lively crowd, DJ performances, and dancing.

2. RumFire Waikiki – Located in the Sheraton Waikiki, this beachfront bar throws a Halloween bash every year with a spooky twist, often featuring costume contests, live music, and views of Waikiki Beach.

3. Sky Waikiki – This rooftop bar offers stunning views of the city and ocean, perfect for a Halloween night out. They typically hold costume contests and themed events, and the elevated space makes for a memorable Halloween experience.

4. Hula’s Bar & Lei Stand – Known for its fun, inclusive atmosphere, Hula’s hosts Halloween events that include costume contests, dancing, and live entertainment. It’s a Waikiki classic with a welcoming vibe for all ages.

5. Moani Waikiki – Located in the International Marketplace, Moani often hosts Halloween events with live music, costume competitions, and a festive crowd.

Each of these spots has a unique vibe, so you can hit one or two depending on your group’s mood!