Insurance card MMP

Question for any Jewish Mumpers and readers ---- I saw something today I can’t figure out or Google-fu. There were several men (30-say 50 years old) with their hair trimmed and dyed to make it look like they were wearing a yamulka <sic?> when they weren’t. And they were in a more religious form of attire and not straight street clothes. This strikes me as not being close to (pardon the expression) kosher - some sort of religious contradiction in terms. Can anyone fight my ignorance on just what the heck I was seeing? This was before dinner and I was stone cold sober.