Disco Bikers

I was walking home from Davis Square late last night, and an interesting site passed by me. A bicycle train of 7ish people. What makes this one different than the rest? They were mostly very tall bicycles, and one of the men was dressed up and wearing a top hat. In addition to his stunning outfit, he had a disco ball, and some music riding along with him. The last bike on this train had some for of fish net over her wheels with glow sticks of some sort throughout. Who were these people? A club, a group of friends? I am so intrigued!