Ollie sleeps in the kitchen as a matter of course which works well all round - he has a warm bed, the boiler's down there, the litter tray to himself, food and water and best of all no interfering kittens
. It's almost always the warmest room in the house so I've no concerns in that regard, and the added bonus is the floor is vinyl so any toiletting accidents are easy to clean up - and indeed to spot first thing before anyone treads in them
I sometimes shut the kittens in the living room - I prefer not to as I really love their company when I wake up in the night, but it's not so good when they become the
cause of waking up. I think I'm getting better at ignoring their shenanigans - fortunately my night splints give me a bit of protection from the toe-attacking brigade, but when they're rolling around playfighting and pouncing on each other it's rather hard to ignore when the surface they're pouncing on is me!
We do need to remember that fit healthy cats are VERY good at keeping themselves warm, if they've got a snuggly bed or 2 to choose from then unless your kitchen drops to sub-zero at nighttime there's really no problem there.