A real Tbilisi underground, it will come if you like Mutabor and RNDM in Moscow. They let us in with a Russian passport without any problems, they even greeted us in Russian. The contingent corresponds to the underground, so the institution is not suitable for the impressionable and gentle, good hard techno with a straight barrel is playing inside. It is impossible to shoot inside, the interior does not differ in something original, it is very smoky inside. The prices for alcohol are affordable (beer is 10 lari), the entrance fee is like for famous Moscow parties (we paid 80 lari each).
We were 100% satisfied, exactly what we were looking for. They bulged so much that my back ached in the morning.
If you have a Russian passport, you will not be allowed in. They will pretend that this is face control. This is called discrimination based on nationality.
Also, if you want to buy a ticket online, the site requests your passport, if it is Russian, you will be refused.