Thank you for sharing that information.

A restaurant is at that 823 Texas Street address today, and 60 years ago it was probably a business of some sort, and possibly a bar or card room. Photo from Google Street View.

The Library of Congress does not have any online directories for Solano County, and in my newspaper databases (newspapers.com, genealogybank.com) Solano County is not well covered, so I struck out there.

I notice that the Marysville, California "Mark's Club" attribution is also in Eastman's 1998 California guide. The Gaming Table and later the ChipGuide perhaps picked up the attribution from his guide.