This is a bit of a minefield, Prok
There are many names for rooms in English domestic history. We tend to have a greater number of small rooms but historically people congregated in one room and often there was one left for 'best' which was kept very neat and tidy and Must! Not! Be! Used! except on special occasions, eg when visitors came.
I think there's probably still a bit of a hangover of that and the 'front room' is a relic of it, even if it's used more in everyday life now.
When I was growing up we had two downstairs rooms and we called them the living room and the sitting room. We spent most of our time in the cosy living-room and shifted over to the (bigger) sitting-room at Christmas time for a few weeks. The rest of the time we barely used that room. It now seems weird to me that we did that, but I suppose it partly meant my mum didn't have to keep cleaning two rooms all the time, just give a quick hoover, dust and polish to the one we didn't use.
Sorry for the essay but I find all this fascinating (not exciting, obviously)