amusingly, another hotspot lesser known in Plovdiv, Bulgaria is Botev PFC https://en.wikipedia.org/wiki/Botev_Plovdiv

Sofia has more spots on btcmap but plovdiv has a lot and it's got a very connected hacker community there, it has long been a place for CS people (Sofia and Plovdiv are two major outsourcing hubs)

it's pretty funny though how much the footballers are leaning in to bitcoin, cool i mean, really