Oh gee I dunno, maybe the right to Liberty, which is doing as I please as long as I'm not harming others or taking away their Liberty. Until somebody can prove to me that I'm harming them by not wearing a mask, my right to Liberty comes before any other consideration. If they're not down with personal freedom, like most statists, I just don't have anything to do with them.
The chains here are all mandatory masks, so I haven't been back. The smaller shops are still mask optional for the most part.