If the owner of the business doesn't want you strapped in his place he can ask you to leave. PC 602 (o) &(m) seem most relevant here. If the owner gives you permission you can probably load up. 12026PC coversloaded open and concealed carry in a residence or place of business . 12031(l) alsopermits carrying loaded in your residence, and probably by extension in anyone else's residence as long as you have their permission, are not trespassing or are not otherwise prohibited.