[InfiniteLoup]

Could you perhaps link a picture of that vehicle?

As searching for "luny cycle" doesn't bring up anything relevant.

However, there this, which looks like an interesting take on the unicycle concept:

https://inventist.com/inventions/lunicycle

[OuterVale]

Not double saddled, but a circus bike is pretty similar to what metalman was talking about.

https://www.municycle.com.au/catalogue/B-CIRCUS-HOPP20_item....

[metalman]

I have tried a few times, but search is dead, there is a long established artists "colony" on the north mountain in NS, writers, theater, and the rest, but the luni, luny, loony ?,just tried again, SEARCH IS DEAD right, and it is too revolting to bother digging through the grasping,simpering, greed validation machine.