Cool tacos + great cocktails + super friendly barman / barmaid = Candelaria.
You enter la Candelaria by a Mexican typical small bar, una "taqueria", push a colored door and arrive on a hidden bar. Just like during the prohibition in the US ? Yes. To be precise, a speakeasy ? Yes, congrats. You won the right to have a super night in Candelaria. Go early, the place is quite small and people from all over the worl gather to taste their amazing cocktails.
My favorite is the "Guêpe Verte". You'll see, it's good for your health, there is a slice of cucumber.