In every state in America citizens are allowed to conceal carry hand guns. Some states are May Issue, where it's the discretion of authority to issue conceal carry permit after met minimum requirements. Other Shall Issue, where authorities shall issue conceal carry permits after met the minimum requirements. Some states allow for open carry and are conceal carry only.
Starbuck, a national coffee shop chain, serve customers regardless of gun ownership or how one feels about gun control. Starbucks President and CEO Howard Schultz published an open letter to their costumers asking them not to open carry in the Starbuck Coffee shops. They can conceal carry, but Starbucks don't want to deal with or debate gun control. Starbucks believe it's the responsibility of the legislature do handle. Starbucks have not intention of frisking costumers as they enter.
You may see headlines that says Starbucks are not permitting guns in their coffee shops, that's not true. Some people have a passion on guns on either side of the issue.