Business man, small meeting room, glass wall, table and few chairs... what to do, what to do... :)
One thing to do is to underexpose the ambient exposure of the room and shift the white balance to get a saturated blue background, while still keeping the warm tones on the subject which is lighten with flash (with CTO). I wanted to keep my aperture open at f2 to get the background out of focus, but to get that I had to go higher than my "normal" flash sync speed of 1/250 sec, so higher shutter speed was in order. Also I ended up using a circular polarizer to reduce some of the reflection on the glass wall, and at the same time compensate for a wide open aperture.
Strobist info: SB700 with CTO inside Lastolite Ezybox softbox, 50mm lens @ f/2 with circular polarizer filter, shoot at 1/400 sec. Flash was shooting in TTL mode.