We also recommend you wear some sort of flower in your hair so you can get used to working with a veil without yanking things out of your hair. Besides wearing flowers in your hair make you feel exotic and beautiful and who doesn't need that sort of encouragement in their life?!? When you are planning to dance a performance it's a good idea to wear all the accessories you plan to wear for the performance to a couple of practices. The last thing you want to have happen during a performance is get caught up in a piece of jewelry you didn't realize would interfere with your chiffons or find out that your hair adornment is not something you can navigate your veil around.
So, in summary just come to practice in what you like and what you feel good in...oh, and don't worry about coin belts and veils - we have some for you to borrow. Although once you get bitten by the belly dance bug you might find you have more dance clothes than regular clothes!