U.K based Director of photography.
If the ceilings are high enough and won't be in shot, you can always have someone with a china ball on a pole, which they can suspend above the talent and follow them as they move. This could emulate lights from above, such as spot lights, or you could have the pole long enough for the grip to hold it central of the room whilst still moving around.
I'd dot practicals around, maybe even with low wattage bulbs or diffusion wrapped around them, and you could always add a little extra light in there by having the TV on a static channel, giving off a different colour temperature which might be aesthetically pleasing.
Check out the Grand Budapest Hotel BTS pictures, as this was a popular way of lighting for the hotel interior scenes.
It would be a cheap option, and you could pick and choose your lightbulb depending on wattage - frosted/unfrosted etc, even wire it to a dimmer if you wish.
China balls are cheap, and you can always defuse more if needs be.
It would be a quick option, as you could build it up before arriving, and it would be fairly intrusive.
Just my 2 cents, but as always - whatever you do, have fun doing it!