This Starbucks is located on the Promenade level at the Aria. It seems like it's owned by the Aria with a Starbucks franchise as employees are wearing a Starbucks apron over their black Aria shirt with an Aria name tag. Some of the staff wear latex gloves while making drinks?!?
Drinks are much pricier than a traditional Starbucks...at ~$5 for a tall Latte...
The line tends to be long so the entire process can take ~15 minutes from start to finish.
...at least you're able to charge things to your room! :)