For years I worked in Washington D.C.
Like most cities, if you commute to a job in the city you are forced to encounter all sorts of people. Many complain that courtesy and manners are lacking in contemporary public life, especially in the city, but I generally find people to be very polite and well intentioned.
As a younger single guy, I also see a lot of young ladies who catch my eye. If this were a club or party I could strike up a conversation with these women, but on a commute, whether bus, subway or street there is usually no pretext. Many times I told myself, "there goes another one" to my regret.