We often stop in at Lobby Bar whenever staying in and around Aria. It's a chill bar with plenty of seating and we really like to just sit back and relax amongst the Vegas craziness. We enjoy it a lot. Drinks arent too expensive considering it's on the ground floor of one of the nicer casinos on the strip. You can get drinks from the bar or if you are seated at one of the tables or couches, a hostess can get your drinks.
Lobby Bar is located right by front desk/registration. You cant miss it.
You get a complimentary sampling of popcorn. Try their specialty drinks.