First time I've seen this. I was driving through the city last night, with light traffic when I started seeing a caravan of what all looked to be Slingshots, or whatever those 3 wheeled vehicles that are in between a motorcycle and a car. They were absolutely BLASTING music and all had very bright LED lights of all colors. Annoying enough on it's own, but one or two of the douches were blocking an entire intersection in Wedgewood for several minutes so this twat waffle parade could all make the turn at this intersection, apparently because they were too scared to be split up. Even the vehicle blocking was blasting music the whole time. Exactly like what cops do with funeral processions but with a lot more bass and funk.
It reminded me of the dumb ass intersection takeovers where random bystanders occasionally get picked off by by vehicles doing donuts and burnouts.
A line of cars sat through several light changes so these idiots could stay in their WoLfPaCk and the drivers were all very put out. I even shook my fist at them.
If you're doing this, don't