Hello,
There isn't much for pool in St. Paul that I'm aware of.
I play 3 cushion at a Hmong pool hall on University & 280 (Khai Hoan Billiards). They have a few crappy pool tables, one nice 3 cushion, and 3 beat up billiard tables. The place is a little intimidating if you are not asian though.
I think there is Al's Billiards, but I've never been there. rack'em billiards in roseville closed down this summer.
I usually shoot at Jimmy's Pro Billiards (columbia heights, close to roseville), and also at Two Stooges (fridley) and Shooter's (burnsville, pretty far from roseville).
PM me if you want more info.