Mystery mostly solved. I opened the cellophane. The cards are probably the worst I've ever handled.
The Ace of Spades had 'Made in England' and a small deer logo. Did some searching. They turn out to be made By Astra England, who were only in the playing card business from 1982-1987.
According to the internet they did mostly advertising playing cards, but also some cards intended for casino use. They are absolute garbage though, can't imagine any casino ever being happy to use such a pile of junk.
My guess would be that the Rainbow Club would be some sad forgotten place in an English God forsaken town. Or just a novelty name.
Case closed I guess. Definitely not selling these, haha.