Before you start your job. I really reccomend getting to know the Staff Members of the restaurant. Especially the waiter/waitress(s). Get to know their shift, and become friends with them. That way you can not only work along with them during performances, but also understand their routes and what not...
Remember, you aren't trying to hog their Tip... Speaking of tips:
1. After you are done performing for a table, don't just stand their like a hawk and wait for a tip. After you are done, move on. If they wanted to tip you, they will. Continue on and perhaps they will see you as they are leaving and come over and hand you a tip.
2. Never DENY a tip. Honestly, declining a tip can be one of the rudest gestures you can make. They have tooken their money out and presented to you as a token of their appreciation for your work. Plus, it's a tip!
-Never approach a table when you see their check balance present. They are about to leave and you dont want to get in their way.
-Don't approach a table when you can see two couples that are obviously in the middle of something. Chances are that they really do NOT want to be interrupted at the time. Just leave them alone. Their are a lot of other fish in the sea...
-If you want to hand out your business cards (which your best bet is to do just that), do not just finish the table and throw your card down. You want to present yourself professionally. At the end, Perhaps a trick with a business card or even simply stating that if anyone would like a business card I will leave one on the table. Then you might gain more intrest by one person picking it up then the other guy wants one etc etc...
-Speaking of professional... Always look your best! You do not want to make an appearance with blue jeans and a t-shirt. Have a nice, clean, professional and elegant look. Not like a tuxedo, but a Suit is excellent.
-Make sure you talk to the manager before hand and understand what is OK and what is Not OK... You don't want to present a fire effect if the manager isn't ok with it. Chances are your in big trouble
Well, for now those are some tips I can think of.
Hope it helps.