OK, a picture of the full moon over the ocean.  Yes, it does say Luna Sea (or actually Luna Ocean).  But the other thing it implies that comes at full moon, and sounds like the name of the motel is LUNACY.  I guess they couldn't really advertise it as the Lunacy Motel.  Let's go have a crazy picnic at the Lunacy Motel.  Yeah.  I'm up for that.