I'd recommend finding out what is common practice among dancers in your own community, and as long as you're comfortable with it, follow their example. Just to give you an idea of how varied dancer opinions are on this subject, here's an opinion poll in which visitors to my web site have responded with their opinions on gathering tips. If you have Internet Explorer, you need version 4.0 or newer. If you have Netscape, you need version 3.0 or higher. If you don't see the poll just to the right of this text, then you'll know that your browser cannot display it.
Arab audiences have a couple of very nice tipping customs.
In Egypt, this money is typically shared between the band and the dancer. The general custom, at least in the United States, is for the dancer to step off the dance floor and go around to visit all the tables in the restaurant up close. When I do this, I think of it as saying hello to the audience, thanking them for coming, and giving them a chance to see my beautiful costume up close. If they choose to offer me a tip, I welcome it, but I don't think of it myself as soliciting tips. Soliciting tips seems too much like begging for my taste.