Ella. Ella would be intrigued by Jo's talent. other than that, I imagine she does spend a lot of time at Moonshine since she is a little party girl and good times ad dancing on tables and all of that, so they have definitely interacted. Ella doesn't really like not getting along with people so she would never do anything to piss anyone off.
Frankie. Also hangs around every now and then, and he brings his drinking buddy Jeffrey. There is absolutely nothing wrong with sharing a beer with your best buddy after work, even if said buddy is your dog. Jeffrey loves beer. Other than that, Frankie is mostly quiet and watches people, but he's not unfriendly. Or friendly. He just is. But he does think she's cute, he just doesn't say anything because interaction is sort of difficult and he ends up coming across as creepy. So Jo, don't mind the skeleton with the alcoholic dog staring at you.
Cutter. Ah, Cutter. He does like his drink, maybe a little too much sometimes. I imagine that he'd have a harder time talking to her in her bartending outfits than he'd have when she's all greased up, because that way she is decidedly less female. It does make sense in his head. He often has dream parties with his fucked up parents and his dead ex, Jo is welcome to join them any time. ^^