I didn't like the idea of him only having room to turn. I didn't use dividers but we never wee'd in his crate beyond a couple of accidents in the first week.
We haven't got room in kitchen either but use conservatory as dining room which is either too cold or too hot.
We have it blocking our kitchen/hallway doorway as there is no door to close and it is blocking puppies access to stairs. I would have no qualms having it in my dining room though.
If you haven't already got your crate I can recomend dog health ones on ebay. They were a lot cheaper than pets at home and personally I think much better quality than some of the cheaper ranges and delivery was within 36 hours. My medium one was £22 and is very sturdy.
I have a small (pets at home) crate for my CKCS. If it's for puppy training (ie toilet training) it's meant to be big enough for them to stand up/turn round in but not so big that it can use half of it as a toilet area. My dog loves hers I have to say.