SquareZ
1. Beginning dancer. Knows nothing.
2. Intermediate dancer. Knows everything. Too good to dance with beginners.
3. Hotshot dancer. Too good to dance with anyone.
4. Advanced dancer. Dances everything. Especially with beginners.
--Dick Crum
Calling Ideas for June 18, 2012

June is:

National Accordian Awareness Month
National Accordion Awareness Month was established in 1989 to promote the accordion, help spread the word about the resurgence in popularity in the accordion and to educate people about the accordion. Here's some info.

I'm sure there are bunches of (old) square dance records that feature the accordian. I tend to associate MacGregor with accordian arrangements.