Now this'll sound ludicrous, but I've finally managed to get grips with the 3 Card Routine, and I was performing it the other day to guests, and I had just finished the trick. Now of course they were freaked out, as one should be with such an awesome effect, but it soon occured to me that I had to do something with the deck. Not meaning to give too much away, one of them said "Where did the deck go?"
In the end I had an awkward solution which I wont go into detail, but it happens that this would rarely work - especially not in a restaurant. (It included waiting for them to leave

Any suggestions as to how to finish it off in that respect? cheers
