I've seen a lot in CA, especially around Venice.
People who like the "marina lifestyle" but not open-water boating use them to cruise the marinas and canals where you can't exceed "no wake" speeds anyway. I used to know a guy in OH that had a 38' Inland Seas cruiser with no engines. He pulled them out and sold them. Every year he launched the boat, had to towed to his slip, and partied all summer - just didn't particularly care to go anywhere.
This is the Pub. Leave common sense at the door.