That sounds more like Nighthawks than Chimney Swifts… swifts aren’t nocturnal. If the call sounds like “peent…peent,” they are nighthawks.
Nighthawks like to nest on the flat roofs of commercial buildings and such.
Good point.
American Woodcocks also peent.
Going over it, I think you’re right. The birds I hear but can’t see chasing bugs around parking lot lights are probably Nighthawks.