I was at Harrah's Cherokee over the weekend. While I was waiting in line at the cashier, I noticed this list of house rules on one of the monitors. Look at the third one.
I suppose banning Google Glass has some rationale, because one might theoretically use it to beam images of one's cards to somebody outside the game and surreptitiously get advice on how to play via an earbud. But I'm unable to come up with a justification for banning "smart watches."
Any plausible ideas?