LGBTQI+ scene
Gazi is the reference area. Athens' gay culture, per Wikipedia, is "vibrant in the capital, particularly in the gay neighbourhood of Gazi". Real concentration of LGBT bars, clubs and venues happens on the streets around the Technopolis complex (former gasworks now cultural centre) and Kerameikos metro station (Line 3).
The neighbourhood started refining in the early 21st century: shifted from industrial zone to entertainment district with bars, night clubs, cafés and restaurants, including gay and lesbian venues. Complementary alternative pole: Psiri, 10' walk away, mixed queer-alternative cocktail bar scene.