Booze Cruise(s)
One of the best ways for my friends and me to pre-game in Waikiki was by taking a quick, semi-scenic trip off the beach on a fun and friendly booze cruise. There are a few options, but the one I always ended up taking was the Na Hoku II (http://nahokuiiandmanukai.com/wp/) behind the Sheraton Hotel in Waikiki. You can call and make reservations for your group or take your chances and hang out near the area around the times they ship out (late morning, afternoon, and early evening). The prices change a bit according to the time of day. It was $35 per person when I last went on this trip, but the price may have gone up since then. The best part about taking this short cruise is that you can sit and relax with your friends while having as many drinks as you can (all drink costs are covered with the entry fee). There are a variety of mixed drinks, along with Coors Light and PBR beers, and some non-alcoholic beverages available. And don't worry! There are bathrooms below deck....