Cups and balls in a restaurant? No way man, just because you saw a dvd called table hopping cups and balls does not mean it is good for restaurants. Think of tricks that will fit nicely in your pockets, and can be performed standing up, look into micheal ammar material, everything he does is standing up.
Think of few routines you can do with a deck of cards, a few routines with coins, a routine with a normal object such as a pen or a napkin, a gimmick, and a packet trick. That should fill you with many good nights and lots of happy customers.
Did I ever state that you should only walk arround with cups? Try something that fits in your pockets??? You can EASILY put cups in a jacket pocket, EASILY. In my opinion, cups seem like a great thing for table hopping, they wouldn't make a DVD called tablehopping cups and balls if they sucked for it. It'd be like making a dvd called sponge balls at kids shows if sponges sucked at kids shows which they don't
Do you know why they would produce a DVD like that. TO MAKE MONEY.
I personally think that cups and balls is to big for a table hoping at a restaurant. Other than putting a deck of cards or putting a single card down you should not use any table space. Taking up to much table space makes the spectators uncomfortable. Also it is distracting to the spectators.
Over all I think you should keep the magic in your and the spectators hands.
I love the cups and balls, but I save them for the stand up shows.