Like Amateria, my "booty call" games aren't actually bad. Well, one is debatable, but for all intents and purposes "not amazing" doesn't make "bad game".
I can pick up and play through Mega Man X on the SNES in a single sitting, and it is always a fun way to kill an afternoon. Over a decade I've been playing it and for some reason it refuses to get old.
The other is the Halo series. I've played through the first one especially way too many times, but if I load up "Silent Cartographer" on Legendary, well, I can play the beginning of the level itself over and over again, let alone the whole level. Don't have to play the whole thing, just that part.
Ice Hockey for the NES/Virtual Console as well. If I'm bored, I can easily load that up and enjoy using the Wiimote sideways for a while.
Though I suppose Godzilla: Monster of Monsters would be a "not that good" game, if I had a working NES or it was on Virtual Console.