SF Chivalry

I've been traveling to New York a lot.  And compared to NY, SF chivalry is nonexistent.  I've heard many West Coasters talk about how New Yorkers are rude.  I disagree.  I have countless stories of able bodied SF men not giving up their Muni seats for the elderly, very pregnant women, et al.  The NYC I saw, did not have this problem on the subway.  Men were even offering me their seats just because.  I've had countless SF men practically push me over to get through an open door.  In NY, I've had countless doors opened for me.  Chivalry may not be important to everyone, but it is to me.