Idea: Every Neighborhood is Segregates
Aspect: Class obsessed
The most common question asked in STL is "What high school did you go to?"
The reason is that, because each of STL's 100 neighborhoods are so segregated by any of variety of factors (not limited to; Income, Religion, Race, Social circle, choice of booze, childhood experiences, crime rate, etc) that when you ask "What high school did you go to?" you can instantly peg and know just about everything there is to know about that person.
It's STL's version of facebook stalking and it's been in effect for like 60 years. It takes far less time, and it's very effective.
STL has a shadow school district. There are about as many catholic schools as there are public ones, and the same sorts of things applies. Something like 30 percent of kids go to catholic school. A large percentage of them are not catholic, but the catholic schools are considered better schools education wise.
The new rich live in different areas than the new rich, and everyone is extremely class obsessed, to the point where you shop in "your" mall, eat at "your" restaurants etc.
I almost considered making this a threat. But STL is very stable. Good fences make good neighbors etc.
(PM about my real feelings. I love the city...but maaaan there are problems sometimes)