What do you do when you find yourself in a small meeting room environment without much space to shoot. Well you have to be creative with what you have right? Today I have found myself in the similar situation, small room, luckily with not just white walls but one glass wall in stead. I used a Lastolite Ezybox 50mm softbox with Nikon SB700 speedlight, with full CTO gell on it, 1/4 power setting. I have set the white balance to be quite cool, that way I can get the glass wall to get that nice blue shade, while my CTO is keeping my subject nice and warn/orange. Also I used a circular polariser to cut down some reflections in glass window and get the ambient light little bit darker, that way subject can pop out more.
Diagram with more details is below: