C.K.
I toured a couple of hotels out near DFW airport several years ago because they were trying to get me to book our conferences there. While showing me the Presidential Suite, they indicated that a couple of moms had gotten together to do a slumber party in that suite one night and it was great because the moms didn't have to clean up afterward. It was one of two hotels...either the Harvey Hotel DFW or the Sheraton DFW. I remember the suite was a loft with 2 floors. Upstairs was the bedroom and bathroom and a spiral staircase led down to the kitchenette, dining room and sitting area. It was really nice.
Good luck! I've always remembered that tour and decided that was what I was going to do when my girls were ready for a slumber party.