Yes, At the Ala Wai Yacht Harbor there is a Friday night series. Get there about 1400 to 1500 with a cooler full of beer
and you are pretty much guaranteed to get invited aboard. Just look for the boats that are rigging
up for the race
Yacht Club and Waikiki Yacht Club are the two major players there. If you have any kind of club card then you can go in to the club houses and ask around.
On the North Shore there is the Kaneohe Yacht Club but I don't know their schedule. You might give them a call while you are in town to see if they allow guests.
Haleiwa has a Marine
Basin but I don't know of any club racing