Courtyard Party

Monday being my day off, I spent the day quietly, went to the store and that's all.  But I have something to report!  I just had a "unique China experience". 

I heard music from the courtyard earlier and looked out the window, but I had the light on, so I could dimly see only some figures and a boombox.  Assumed it was some teens hanging out and forgot about it.

But then a few minutes ago, I went into the kitchen to get some water, and it was dark so I could see clearly outside.  There are about a dozen middle aged women down in the courtyard playing music and doing line dancing!  I have no idea whether this is an impromptu party, an aerobics class, senior night, a dance class, a rehearsal for a festival...?  It may be a coincidence, as it's too dark to see really well, but most of them are wearing dark pants and red jackets.  As I was watching, the song changed and two of the women started doing some kind of ballroom dancing with each other while the others continued messing around with the line dancing.