Unusual Sight

Walking home last night around 11pm, I heard Latin music playing. I figured it was just someone's car radio but as I got closer I realized it was coming from a stereo - and there was a group of 8 people dancing in a line! I was so confused that I just stopped and stared (from across the road, of course) but could make out no reason for this random street entertainment. I watched for a few minutes and then carried on home.