The one trick that I always carry with me is my own No-Gimmick Scotch and Soda.
The gasps from customers when the coin changes in their own hand is a joy to hear.
I developed it specifically for table-hopping because of the reset problems with the gimmicked Scotch and Soda.
Plus the fact that the gimmicked coin in the basic set may look genuine but it sound and feels like a lead washer!
My routine uses no gimmicks and, while written for use in Canada, the patter can be adapted to almost any country in the world.
The routine originally appeared in my Showtime column in the Linking Ring magazine a few years back.
Anyone who is interested, can have it simply by e-mailing me at the address, below.