Bicycle,
Despite my previous ramblings about flourishes, and people spending more time learning how to control the cards, I do a card spin, and it does go down very well with Joe Public.
I only do it with one hand, I don't see the need to be able to do it with both
If I can help PM me, but it did take a while to master

Without giving too much away, it is the version where you spin the top card of the deck upwards, and catching it takes as much practice as flipping it
It really does get 'Wows' in the pub though.
Tenko.
Yorkshire, UK
Male, 55yrs old, Retired.
"I don't believe it" Luke Skywalker
"That is why you fail" Yoda