Seeking Immortal Dancing Master:
Ninghai County:
The dancing ninny is the one who circles the city of Ninghai.
Shitang County:
Shitang's is the dancing girl.
King City:
King City is the Dancing Ninny
Gateway:
Always dancing around the gateway square
Vip:
Vip Taoyuan Village has two lead dancers dancing around the village
Both dance around the city, just turn around and you can see them.
There's also a wild dancing master that loops around a few towns, which is harder to find and usually requires someone else's notification to find.
In fact, a few people dancing experience are about the same, experience high and low is depending on your level to count.