SUCKER MONEY(1933)
In the set: 100 Greatest Mystery Classics

A newspaperman is given the job of scoping
out a bunch of bunko hoods! He goes in as
an actor to bust the story wide open, but
gets found out! It's an interesting movie,
but the sound is bad and can't be heard
without headphones! C+

A review from IMDb.com:

It's rather unbelievable that anyone would
fall for this spiritualist stuff. Here the
spiritualist world is simply a movie shown
on a regular movie screen, which isn't very
other worldly. There are a number of interesting
1930s characters in the movie though, which
made it pretty enjoyable to me. It's interesting
to contrast their fake "spiritualism" work
day personalities with their actual everyday
personalities. The 2 black dudes spend their
working day being zombie like guards, but
then enjoy tossing dice after work. I'd enjoy
hanging out with them more than anybody
else in the movie.

Anyway I always enjoy Misha Auer, who never
gets a starring role, as far as I know,
except in this movie. I also enjoyed seeing
Mona Lisa, in her only talking role. I always
wondered what she did after posing for that
painting :-) - rmanny-1