Located in a neoclassical building, and its amazing garden, Balthazar trully feels like an oasis in the center of Athens. The crowd is usually mid-30s professionals. Music is not really loud, because of the houses overlooking the garden. It is nice for chilling out with a nice cocktail, or having a nice quite dinner. Reservation for dinner is required since it is considered quite trendy for a night out especially during Fridays and Saturdays. Prices are a bit steep though.