A bit like American Line or Square Dancing, it is a social event where dancing is done under the instructions of a masters of ceremonies and you switch partners or dance in a group. So you don't need to know how to do any of the dances beforehand, though some dancing experience is helpful.
Bush dances were held around Australia in the colonial days as a way to bring people together for social events. Not everyone could dance or knew the same dances so by having a dance called explaining the steps, everyone can join in.
Bush dancing at the annual ball
Yes, the bush dance at Morningside attracts an older crowd, but there is a wide mixture of people. The regulars will help you through any dances and dance you off your feet with their fitness.