This is the one near my place. I suspect you can find a similar one nearby: http://sdh-takaido.sakura.ne.jp/kumin.html

(It was a bit more expensive than I remembered, but still extremely reasonable)

Thanks for the link! It's very reasonable, unfortunately a bit limited in terms of time (usual the programming meetups I organized went up until almost midnight). Still good to know that these kind of options exist.

Looking for places open until midnight really limits your options.

You can generally find one by searching for ‘{town name}公民館’. I used one daily for a couple of months once as the internet in my new place wasn’t ready yet. Sometimes I would just ‘borrow’ the WiFi while staying inside my car. The internet is generally very fast and you’re not competing for traffic with anyone else.

A friend also organises painting classes in his local one.