There is a

Bulmaro L Avila
Age 65+
Lives in Claremont CA
Used to live in Baldwin Park CA, West Covina CA

Also, the font on the back of the card is not something that was widely used in the 50's

It's also the same logo as the last slot club card that was around before the closed the doors and renamed it Binions.

It is NOT from the 50's