This is:

Urban Cowboy premiered in Houston

This movie, starring John Travolta and Debra Winger, set off a two-stepping C&W craze in the 80's.

Songs from the sound track that I know have square dance versions:

• Lyin' Eyes by the Eagles
• The Devil Went Down to Georgia by the Charlie Daniels Band
• Orange Blossom Special

Can anyone think of a movie plot that could make a fad out of square dancing?

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.