Still, New York is THE place to try quality cocktails. Even in London you may have hard time spotting decent cocktail venues.
In Yerevan, it's even worse. I would suggest trying pure drinks. Some people would disagree with me, but over the last few years, I failed to find any venue in Yerevan which provides with quality cocktails. The last example was at a "7 Kadr" new cafe-bar behind the cinema Moscow in downtown Yerevan. Nice design. Slow service. Decent food. Not too expensive. As to the cocktails... I started with the classical ones – Apple Martini and Cosmopolitan. They were anything but... I quit, and ordered mineral water instead.