So after my friends & I left the Mandarin bar, we were like let's find the best restaurant that's open and get a tasting menu. We had no clue what would be open but to my surprise there was a spot called LemonGrass open in the Aria hotel.
We headed over there and sure enough it was like midnight at they were open till 1-2AM and still were doing tasting menus. We were quite toasty at this point however they served us. They also don't think had any idea what "gluten-free" meant since our waiter didn't even speak English. Which in the food industry hey, It could be a good thing! The food was excellent, the drinks were tasty and overall I'd go back to LemonGrass, especially for being open late night.