PICA's Aloha Festival lets you literally get a taste of the islands until you get over there, no airplane required!
The 2 day event is being held at the San Mateo Event Center on August 1 and 2 from 10am to 5pm. http://www.whatshappeningcalendar.com/events/NorthernCalifornia/San_Mateo_Aloha_Festival.html
There will be lots of entertainment, food, drinks, music and more. Bring sunscreen, blankets (can get chilly at night) and enjoy yourself!