I think the same things apply to calling dances. Best to have them in your head - especially if you are playing at the same time. However, I am happy to admit - I've never called this before - usually at a dance club - and please could you help me make sure it works Ok - and have a crib sheet for that occasion.
I also find a large written list of dances helpful - you are never quite sure what shape the hall is or how experienced the dancers - so you can pick suitable dances or alter the ones you know.
FloraG