[ctrust]

Trade conferences. (Trade conferences will outlast all digital media.)

[cseleborg]

This piqued my interest. Can you elaborate?

[sandspar]

Not OP, but we've had variations of "let's get a bunch of people together for a party" since the Stone Age. Meeting and events became a formal "industry" only a few decades ago. But meetings and events themselves are as Lindy as prostitution and war.