Here are some of my favorites that fit that style and a place to start with each of them:
Dan Fante (Chump Change)
Fernanda Melchor (Season of Hurracaines)
Irvine Welsh (Trainspotting)
Raymond Carver (What We Talk About When We Talk About Love)
Pedro Juan Gutierrez (Dirty Habana Trilogy)
These are just off the top of my head. There are a lot more of course, some of which you probably know (Hunter S. Thompson, Vonnegut, etc.). You should obviously check out Bukowski's influences (Céline, John Fante, etc.), too. Also, I must suggest you check out work created by the memebers of this forum. You won’t be disappointed.