Some random building used for parties that one person pays for regularly so everyone else can stand in social circles and talk about random topics because they have nothing better to do.
It would look like a warehouse full of shelves that are very well organized but there's no map, and a lot of the shelves have the exact same designation but completely different contents.
Ever walk into your college campus center at 11:45pm on a Saturday and discover the 25 unwashed dudes that are in there playing Smash Bros in a massive LAN party while drinking a mix of Mt. Dew and beer?
From my point of view, this place seems very niche, techy, and "inside joke"-ish... So ima say a Cyber/tech coffee shop with a buncha (kind/seemingly friendly) Nerds all huddled up at tables together. Theres a separate cafe room just for- whatever the fuck Linux users do. And 75% of the men there are femboys in thigh highs. Everyone speaks in a way that, unless your a regular customer of the cafe it's gonna be complete fucking gibberish.
It is one of this places that were built by anarchists without any license and look, smell and feel quite funky. The audience though is really nerdy. So the closest that comes to mind is a Hacker space in a large European city.
Picture if you will a conputer genius, an expert in his field able to write like Shakespeare in basic. This person lives in 1985 and so what would be less than a raspberry pi today is now a large room filled to bursting. Lemmy is that room