Good question. I have seen lots of belly dancers do the same and it really saddens me. When these dancers perform, and they take money, it takes away from the performance itself. However, I have seen belly dancers grab the money and put it in their belt. There are some who know how to keep hands off their body. There are also some dancers who go around with a basket at the end of their performance asking for money.
Ronnette "Rhani" Ramirez, Bellaonline Belly Dance Editor