Just picked up swing - we’re just starting our 50’s and I never learned to dance. Two short courses this autumn and back again in january for 3 more until april.
There are dace-halls and clubs, but here in Norway its kinda fringe culture so you need to look for it. No fancy nightclubs or stuff like that as far as I know that have dance floors and music. There are huge dance parties in sports halls and the likes in the weekends. But they are far out and about.
Much of your choice of moves comes down to your partner.
In a place where dancing happen people are usually helpful and know more than basics, so i’d not say unprompted. Dancing is about promoting.