Boat charter, 30th bday, approx 100-150 guests?

My 30th birthday is in July, as well as my farewell party (moving to Europe for a year). I want to charter a boat for a party of 100-150 guests and host a 1920s-30s themed murder mystery dinner. I've got the murder mystery dinner part covered, and ideally, I'd like to provide the food and drinks myself (I have a very specific idea of what I want the night to be). Needs to be in the Southern California area (Marina del Rey, Newport, Long Beach, etc). Any information/referrals/estimates would be appreciated. THANKS!