The legend says that Bono and The Edge enjoyed so much a night at this bar, located in the Clarence hotel in Dublin, that they decided to buy the whole Hotel. The question is: what was served to them that night? Probably Martinis. Apart from legends, the Octagon is one of the best cocktail bars in town. The staff is very professional, the place is classy with nice some art decò details, and drinks are simply good. Happy hour goes from 5pm to 8pm (normal prices are a bit hight for Dublin standards). Classic Martini rate: 7.