Trust me, the address is accurate—persist in your search and you will be handsomely rewarded. Pótkulcs is a hidden bar, nestled inside a former light engineering workshop in Budapest's District 6. Once you find the nondescript entrance, proceed through Pótkulcs' expansive, leefy patio to its adorably gritty, art-laden interior. Attached to the main section is a cavernous performance hall where they host live music performances almost every evening (including lots of Hungarian folk music). The vibes, as well as the crowd, leans toward the bohemian. Pótkulcs serves better-than-average bar food, available every evening except on Sundays. During the warmer months, the action shifts to the outdoor patio.
After you leave, it’s worth walking around this mostly working class neighborhood to understand the extent to which Budapest's once grand housing stock was left to decay during communism, and, in areas like this, even after that (in downtown, many buildings have recently been refurbished).