Garden tools room was not built as a dance hall. It became part of the thermal envelope, has walls and passages, and is used as a heating room (the utility room was very small), storage space in the heating room, garden tools & mudroom, and a narrow but 7-meter-long "little room" serves my husband and me as a home gym. Where it currently says "Fitness" will be the video game collection, as well as an alternate desk in case we get on each other's nerves while working from home. =) The TV wall is rather secondary for us, we watch little TV, mostly in the evenings, plus it’s not the south side, and we have a shutter on it.
I will think about the color suggestions. At least about some of them. ;) What do you think about a pale reed green? Our kitchen was almost that green, but then we switched to white.