I was actually surprised that Philadelphia still has Midnight Mass at midnight, since unlike NYC it’s not really a 24-hour city and public transportation isn’t really available. It was indeed full though. They never seem to have trouble filling that place for any special Mass.
Of the other cities I’ve checked, only Baltimore has one midnight Mass at its old downtown Cathedral, while the big Mass with the Archbishop is celebrated at 10 pm in the other Cathedral out in the suburbs. Cleveland, DC, Pittsburgh, and Cincinnati all have their Cathedral “Midnight” Masses at 10 or 10:30 pm. Wilmington DE , which to be honest is a city where I wouldn’t want to be walking around at night, actually has the big Mass with the Bishop at 4 pm and has a “Midnight” Mass at 10 pm in some other historic church.