Can anyone explain to me what going on in Lawrenceville at 4am on a Monday morning?

I just moved to Lawrenceville like 2 weeks ago and had this experience twice now. I leave my place for work and hit butler street to get to the 40th st bridge and there’s people everywhere and cars just stopped in the middle of the lane. They don’t have hazards on, they don’t move once you’re behind them. They just stop dead smack in the middle of the lane no where close to the light while people are running around. I’ve had to go around SUVs blocking the lane twice. I went around two SUVs today. It’s 4am, aren’t all the bars are closed? It’s Monday morning. What is possibly going on?