Lighting for a small group on next to nothing.

Hey guys,
I'm shooting some stuff for some guys doing a dubstep podcast and they want to get a group shot sitting at a table tonight.
I was just wondering how you guys would light this? I have a YN-465 that i was intending on using in a 34" umbrella high camera left/right (depending on how they set up) as the key light and a crappy generic kodak thing that I was thinking would work on camera as a fill light (its the only was i can get it to fire reliably).
I'm pretty sure both flashes have a GN of 33 and its going to be dark so I wont have to work to hard to overpower the ambient.
Just looking to see if anyone has some experience shooting groups with two speedlights or just has any better ideas.
Cheers, Stephen.

Can you just bounce a single flash on camera? Idk what you mean by overpowering the ambient. You aren't shooting outdoors in the sun.

Or use the OCF left or right and bit a piece of foam board or anything you can use as a reflector for fill. $2 at a craft store.

Ah should have mentioned, Its outside. A Reflector is something I hadn't thought about actually, good point.