In NYC there is a phrase "Bridge and Tunnel crowd": https://www.urbandictionary.com/define.php?term=bridge%20and%20tunnel%20crowd https://www.urbandictionary.c

In NYC there is a phrase "Bridge and Tunnel crowd": https://www.urbandictionary.com/define.php?term=bridge%20and%20tunnel%20crowd https://www.urbandictionary.com/define.php?term=bridge%20and... Which I suspect this is a riff on.