In our area we sometimes dance on highly polished floors. These can be too slippery. The solution is to scatter a small amount of rosin power on the floor. this is easily picked up with a dust mop if necessary. The question is, does anybody know of an inexpensive source of powdered rosin?. Currently we use the rosin distributed to baseball teams to improve grip. that seems to be available only in 4 ounce bags for about $4.00.