As gsteinb said, there have been races at Limerock. THey're like circuit races, like a race through Central Park. I suppose if you got the parking lot involved it'd be an actual crit. Not sure of costs.
I raced once in Waterford (?) MI. Motorcycle track I think, maybe a kart track? It was soooo narrow. Rained a lot, slippery as heck. A lot of guys hit the deck.
Limerock too can be way slippery in the wet, although in a super heavy downpour (you get the V of water coming off your wheels) the water is too deep for slipping to be a huge concern (because the deep water slows you so much).
Two clips of Limerock. You'll see quickly that it's about as corner-less as a bike race can be.
May 2015:
The finish, as recorded by the promoting person:
July 2015:
And an article about a guy that ended up briefly famous for having the skewer end stuck in his leg (limerock). I thought there was a clip of the crash but I can't find it:
https://www.stickybottle.com/latest-...-cyclists-leg/