Eleven has a very nice happy hour from 4:00-6:00 with an assortment of interesting beverages and appetizers for $6. Our large group tried the charcuterie platter, tuna tartare, pretzels, and oysters. All were excellent (house made duck prosciutto a favorite) but the pretzels seemed to be deep-fried more like funnel cakes than a traditional pretzel.
The bar area is light and open and provided a nice view of the neighboring strip district. The happy hour prices were reasonable but I cannot comment on the normal entrees or menu prices. I'll be back to do so though!