LeftyBassist.com

No lefty content, but here we do have a female upright bassist slammin' away at the strings and obviously into the music.
L.S.D. on Letterman -pun intended!

Here's their homepage: http://www.lakestreetdive.com/

I love this band. I discovered them a couple of years ago on the Music Fog YouTube channel. Lots of great Folk/Americana artists up there. I've yet to encounter a bad one. They've broken a few up and coming artists like Lake Street Dive and The Civil Wars too (before they won a grammy).