The types of cars too. If you see 2003 Honda Civics with fart cannon exhausts and foreign flags hanging from the rear-view mirror do not live there. Also, in areas which seem like nice suburbs but most cars are 'luxury' crossovers or BMWs and Mercedes cars it's a safe bet most people there are Jews. Drive through the neighborhood you want to live and notice if they have the little Jew thing on their front door. It's called a Mezuza. Looks like a 2" cylinder nailed to the doorframe. I grew up in a mostly Jewish neighborhood. It wasn't bad but they weren't friendly. The only neighbors and most kids from school we were friends with growing up were other Catholics. We didn't segregate ourselves we just had similar values I guess or they avoided us.