A hidden fancy dining experience. While we were staying at the Skylofts at MGM we were offered the chance to dine at The Mansion. You need to make a reservation and then a host will walk you from the Skylofts to the Mansion. When we were there on a Sunday afternoon, we were there with only one other group. It's an al fresco dining experience inside of a huge atrium that looked like an Italian villa courtyard.
We sat at a shady table on the patio and had dim sum asian dishes as well as some other chinese dishes. The menu seemed to lean towards asian tastes and everything was delicious. There weren't any prices on the menu, but I happened to remember most of the prices from when we were making the reservations. As a couple anchor points, a dim sum dish of 4-6 dumplings would be about $12-20 and an entree like duck fried rice would probably run about $30. It was definitely a splurge, but the experience was fun. After the meal you can hang out a bit in the gigantic atrium and take photos and just enjoy the Vegas sun without the brutal heat.
It's a fun experience if you are looking for a little different splurge.