Second Location

These are the photo's for our second location, the interogation set. Although we need a room we can black out, I am hesitent to use this location due to the mise en scne: even with the lights out will it look like a school? If so, how realistic? It could be problomatic, but seems only a location that we can black out enough to work in with a desk and chairs.
There has also been debate on the first draft of sub convention and where or how we care going to use colour and black and white shoots. In the first draft, we had the interrogation in black and white, and the flashbacks in colour. If we were to shoot however in a low light room, with the camera filming in black and white, it could seriously harm the quality of the image because of low lighting (as I am aware we are going to have an issue with this to begin with).
Whilst in this area, it would create a sub convention effect, I am worried primarly on one thought: would the audience understand this swap? Typically in film, black and white footage is used within flash backs and the present day or time is shot in colour. As our project is meant to capture the attention of our audience, what would happen if they were to be confused - an audience generally don't like films that confuse them in some ways, as Inception for example, features both good critique and negitive due to the percentage of audience that generally understand it's concept.
I have also identified another error with this roll of flash backs being in colour as it is going to be dark and at night, we are hardly going to be picking up colour in the first place - however I would still be hesitent to shoot in black and white film, instead I would prefer until we arrived at the editing stage to add colour effects and lighting options so that it does not darken the film that we will already be battling with to pick up well.