So what can you wear under a ghawazee dress/coat instead of a decorated tribal bra? I don't have a tribal bra that fits, but do have a halter top. Would it be okay to wear a choli or similar style top?
A Choli is Indian isn't it, if it is, it has no inclusion in Egyptian dance whatsoever.
For us dancers the idea is to have tribalish style costumes that "could have been" seen in a medieval type setting. So modern takes/interpretations on historical middle eastern work. In the larp game, we dancers represent a nomadic traveling, or as I call it "fantasy gypsy", culture.
A "belly dance belt" itself is new. Traditionally people just wore their normal clothes which usually meant a scarf around the hips for emphasis. And none of the examples you give include wearing money across the butt. It was used like jewellery - around the neck, across the chest, in the hair - not as a belt around the hips.The idea of wearing coins is not new, but the idea of wearing them as a belly dance belt is a modern interpretation.