Depending on the level of 'drama' you want to do, I'll second The "I Love You" Song from SPELLING BEE. It's beautiful, but might not be what you're looking for. Some other ones:
Been a Long Day from HOW TO SUCCEED might be your best bet from what I've got. (2 women, 1 man.)
Three Friends from CLOSER THAN EVER (2 women, 1 man)
There's Gotta Be Something Better Than This from SWEET CHARITY (3 women)
He Plays the Violin from 1776 (2 men, 1 woman, kind of hard to do that one any other way.)
Pretty Little Picture from FORUM (2 men, 1 women, very silly.)
Fugue for Tinhorns from GUYS AND DOLLS (3 men, very short.)
Who I'd Be from SHREK (2 men, 1 women... but really, the men are an Ogre and a Donkey, so whatever.)
Also, TICK, TICK... BOOM! is written for three, 2 men and a woman, so that can be a good source for you if any suits your needs.
Words don't deserve that kind of malarkey. They're innocent, neutral, precise, standing for this, describing that, meaning the other, so if you look after them you can build bridges across incomprehension and chaos. But when they get their corners knocked off, they're no good anymore…I don't think writers are sacred, but words are. They deserve respect. If you get the right ones in the right order, you can nudge the world a little.