Rags sharqy is the actual name of all styles of dance from the Middle East, but for marketing purposes they changed the name to belly dance because the majority of the movement is focused on the belly.
In learning belly dance, the control of your body improves be it when moving individually or when moving them together.
Belly dance usually is done amongst ladies because they are comfortable enough to move more freely.
Raqs sharqy covers a whole range of dance styles like Egyptian, Persian, Turkish, Kurdish, Azari, etc. Nancy is an expert on all the above styles.