I ride the SEPTA bus to and from school every day, and I often see older people standing and younger people sitting. What's the etiquette for offering someone a seat?
I, too, ride the bus pretty frequently, and I like to think about how public transportation is one of the great equalizers (that is, for people who actually use it). If there's traffic, we're all stuck in traffic together. If someone's eating a smelly sandwich on the bus, we're all smelling it together. If it's crowded, we're all...