[Callers] Waltz-Time Contra Choreography

[Winston, Alan P. via Callers]

Here in the San Francisco Bay Area I don't think I've ever seen  a waltz 
contra done.
(I love waltz country dances, I do them in English dancing pretty often, 
and I'd be happy to call
the occasional one if I thought I could sell it.)

So my questions are:

Are waltz contras commonly done in your area?  What area is that? Do you 
remember when
they started being done?  How did callers introduce them initially?

Thanks,

-- Alan Winston
San Francisco Bay Area