I submitted a chip with the same font as your chips -- BSL -- to the Chip Guide. My chip is a different mold. Gene and I worked on this one without finding any records. In our conversations, he said he knew of the illegal game in Bay St. Louis, MS -- along the Mississippi Gulf Coast. And, I grew up there and have heard all the stories about the two locations where these games were held. People who know referred to an Italian Restaurant with a name ''The Wheel Inn" Other old times said the game moved to a location in an old abandoned Drive In Theater that was located close by, but offered the option of a tall metal fence, backed up by a thick stand of pine trees. The game operated in the early 50s.
Here's the link to the Chip Guide:

http://chipguide.themogh.org/cg_chip_search.php

Also the chip I have -- only two I have ever seen