I love the atmosphere at Brio. Although it IS indeed a chain, which is not my favorite part of a restaurant, it is still nicer than your average.
Their outdoor seating is spectacular. The misters make it bearable to sit in the summer Vegas heat, the fire pits are great for the cooler evenings.
The food is pretty solid - I love their entree sized salads. I can't comment on cocktails or desserts, as I've never had one there, but I'm guessing it'll push above average.
Overall, it was a great place for chilling on the patio or for a business lunch.