Thirty or so years ago a since deceased acquaintance told me his experience calling a
contra dance for developmentally disabled adults.
The first dance he chose (I assume it quite simple) took a while to teach.
But once started the group enjoyed it.
When the group lined up again and he started teaching another dance, the group protested.
They wanted to do the same dance !!
So he did the same dance for the rest of the program.
I don't recall his telling me how long the program was.
I can't imagine your doing more than 3 dances in an hour
But don't be surprised if you end up needing only one dance.