LGBTQI+ scene
Wikipedia defines Copenhagen as "one of the most gay-friendly cities in the world". The scene is concentrated in the centre of Indre By around Studiestræde, the historic axis of gay bars, with extensions towards Vesterbro (Meatpacking District, young queer) and Nørrebro (alternative).
Human scale — Copenhagen has ~660K inhabitants, far fewer than Madrid or Berlin, so the offer is compact but dense. A mix of classic bars (Centralhjørnet, Oscar Bar Café, Jailhouse) and weekend queer clubs. High LGBT visibility without the need to cluster in a single neighbourhood.