We rented a yacht in Los Angeles through OnBoat for a great ride, had too much fun if you know what I mean, so then arranged to rent it as a sleep aboard for the night. A perfect weekend!
Antlos - Airbnb for boats
Boatsetter - Rent a boat, with or without a captain. Powerboats and sailboats, anywhere in the country.
Sailsquare - Airbnb for sailing holidays
Sailo - Airbnb for boats
YoYoBoat - YoYoBoat is the first boat rental marketplace designed specifically to connect Owners of boats under 26-feet with verified Renters.
GetMyBoat - Book boat rentals, charters, tours, and lessons in 171 countries around the world.