I have been to Gorki about 4 times. The wine is excellent and well priced. The food is OK.
It is well located and overall not a bad tapas bar. What sets it aside is the terrible and sometimes non existent service. I have walked out 2 out of the 4 times (2nd and 4th and final visit) as the waiters just ignore you when they are busy and just concentrate on the locals. They are experts at avoiding eye contact.
There are plenty of other places.... My advice is to spend your hard earned money at somewhere that appreciates you!
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