I was starting a Zumba class and everyone was telling me to get shoes with little traction or you could risk twisting a knee.  I searched "Zumba shoes" through Amazon and really liked these that came up, and others reviews saying they used them for Zumba sold me.

These shoes are just not going to cut it for me in my Zumba class.  They have no middle/arch support - there is only sole on the toes and heel.  I have plantar fasciitis, so these aren't particularly good for me.  I end up putting all my weight on my toes because it hurts otherwise.  Also, I take Zumba in a dance studio and the floor is very slippery to begin with, and with these shoes I have absolutely NO traction.  They are being retired as Zumba shoes and will serve as my Yoga shoes instead.