ROBYN BECKGetty Images To walk around downtown Los Angeles is to see ghosts. Even on a crisp, bright Sunday morning, they’re impossible to miss. The ghost of a thriving financial district, once dubbed the Wall Street of the West, now abandoned. The ghost of a beloved streetcar system that was ripped out in the 1960s, leaving L.A. dependent on congested freeways. And if you believe in this sort of thing, there are also the ghosts of all those who’ve suffered and died at the Hotel Cecil, whose checkered history is the subject of the new Netflix documentary