Carla Tortelli
When Carla Tortelli wasn't busy yelling at her coworkers, the perpetually pregnant Cheers waitress was dumping beer on regulars, terrifying the newbies, or hitting on any of Sam's old baseball buddies when they stopped by the bar. Although her attitude on the show was endearing, at any other establishment, she would have been out the door.
Bender
Bender may have three times the strength and stamina of a human, but that doesn't stop him from trying to take the easy way out of a job. Bender likes to live hedonistically; his main hobby is coming up with ways to make money without actually working.