Sam mentions to her client that he doesn't seem like the type to be happy with percale sheets as if they are substandard. Percale sheets are available in 600 thread count (and higher) and are generally thought to be superior to most other types of sheets, which is the reason why most luxury hotels use them. Percale is also a weave and has nothing to do with thread count.
Light years are referenced as a measure of time by one of the women. Light years are a measure of distance.
During the opening sequence the "Montecito" is not shown in the overhead shot down the Strip. It should be across Las Vegas Boulevard from Mandalay Bay and Luxor in the location of the former Route 91 Harvest.
It becomes obvious that Delinda is not a Nevada local; in the middle of the episode, she pronounces "Nevada" as "Nev-ah-da." Every single Nevadan knows that the correct pronunciation of the state's name is "Nev-a-da", with a short a in the middle, not a long a. It is likely to have happened in some other episodes as well.