If you stand on a street corner staring up at the sky on a Saturday night, it's amazing how many people walk by without noticing or wondering why you're doing that. The few that don't, see a total lunar eclipse - the best in fifteen years. Some admit that they'd read about it, but had forgotten it was happening and all too many were completely oblivious to all the publicity. More people stop when they see more than one person looking.
Even when something is pre-advertised, free and remarkable, it's hard to get people's attention.