Just read about this in the Westender and made a mental note "Champagne and Dessert Bar". Then our chocoholic companions weren't thrilled with the 3 dessert options at Wildebeest (rest of the meal was delightful) so we decided to check it out. We arrived around 8:10pm on a Saturday night and had to wait at the small bar (4 seats) for a few minutes for a table. Very friendly staff, interesting selection of desserts, macarons, and individual chocolates plus an extensive drinks list. The espresso was excellent and reasonably priced ($2.85 for a double). A very nice option in the area and the "happy hour" menu ($6 for 1 or $15 for 3 desserts) looked worth coming back for another time.
Added point of interest: possibly the most noteworthy bathroom experience I've ever had. Worth a visit just to check it out.