I see them more and more. Usually it's a dinette and a couch in the slide. I like the idea of a huge u shaped dinette though.
The Aerolite 250kbhs comes to mind as it has a huge u shaped dinette. Also the Shadow cruiser 260 was available with a similar dinette.
In 5th wheels Outback makes a bunkhouse with that dinette style.
If you're looking smaller, a nice TT is the Passport 2400bh. It's a smaller u shaped dinette, but still a nice unit, especially with the upgrade grey fiberglass exterior.