These girls are my friends - two bassists, singer, drums - no guitar. check 'em out if you're in nyc, royal pink:

http://www.myspace.com/royalpinkrocks

Rothko, if memory serves, have or had three bassists at one point. Their website (http://www.rothkomusic.co.uk/) doesn't mention it, but listening to their myspazz suggests that they are, indeed, a 3-bass band.

Hugo Largo had 2 bassists, didn't they?

Also: Headbutt

Headbutt!! Do you know, ever since I saw this thread I've been trying to think of that band's name. Didn't they have about four bass players?

Some blasts from the past -
God
Terminal Cheesecake
Deity Guns, I think were French, and Lee produced their album
Ganger (check out their classic album, Hammock Style)

How about Ornette Coleman? He often plays live with 2 basses. Does he count?

I too can confirm the new live Fall line-up is pretty bass-heavy!

Burmese

Weirdly, I found this album on Thursday, having not listened to it for many years, and it seems to have aged terrifically, unlike a lot of things from that era.

How good is the god / terminal cheescake 7"! Amazing...I never knew they both had 2 bassplayers

CSS?

man is the bastard was the only one that came to mind

there's a really good noise/sludgey/math rock (hate that name) band in the early- mid 90s called Milkmine that had nothing but 2 bass and 1 drummer. great stuff!!

morkobot

BEARCLAW

Enemymine, which was Mike Kunka's post-godheadSilo band for a bit.