There are so many tips here, but I think it would be hepful if someone could make a guide where you can find old/new ettiquette, rumours, special dislikes (like Queen Elizabeth toughts about pants), and differences between countries.
Just a suggestion :)
In the early 20th century and all the years before smoking was a sign of elegance and many people do it, so I guess despite we know now all the reasons for not start smoking they did'nt knew this before and for them was only something that makes them more "interesting"