Don’t forget Gardulla the Hutt, who owned Anakin and Shmi before they were sold to Watto.
There’s also an interesting scene with some Hutts in the comic storyline Emissaries to Malastare. Mace Windu encounters a Hutt who’s missing half his head. Apparently, just like worms, Hutts can regenerate severe injuries.
In the distant past, I read a fair amount of Star Wars novels.
As I recall, Hutts are actually born skinny; they’re like walking snakes. As they age, they naturally gain weight, it’s a sign of prestige. Seeing as Jabba’s so fat he can hardly walk, he’s done fairly well for himself. There was one Jabba in the books who had a genetic defect; he couldn’t gain weight, so regardless of his age, he was always the bitch in the group. I imagine people like him become plumbers, or take to the straight life.
Suggesting an isomorphism between Hutts (an entire race) and the Mafia (a criminal class), in the context of this question, seems to imply a perception that all Italians are somehow connected to gang activity. This matches the perception that the American Italian Defamation Association has of the general perception of Italian-American people engendered by Hollywood films.
I’m 99.97% sure that she was joking, 'cuz she’s such a sweetheart.