Good question, and there are as many answers to it as there are bars serving pizza. Which is to say, it’s somewhat fluid. The South Shore of Massachusetts may have the greatest density of this style than any other region, but it’s a genre that appears in other states as well, if in slightly different form.
To my mind, most bar or tavern pies I’m familiar with and love are:
Very thin crusted
Well-done but not to the point of being burned
Large enough to share but small enough you could house one yourself
I’m combining two Weekly Pizza Lunch outings into one here. That’s because they’re practically the same place. —The Mgmt.
There’s a pizzeria mini chain in the heart of Manhattan that I think doesn’t get enough attention or praise.* Part of the blame may lie in its unusual naming convention. I mean, did you know that the pizzerias Gruppo, Posto, Spunto, Vezzo, and Tappo are all related and are pretty much the same thing? I know! You’d think they would have settled on one name and stuck with it. (Think of the efficiencies gained by maintaining one single website!)