Gladys, Joe and Virgil photo

Well, look what I found in my stack of photos.  This rare picture of Virgil Vail with Gladys F Vail and Joe Oldenkamp. Now I don't know if Gladys and Joe were married at this point I but I know eventually got married.  I could assume that they were not because Joe is not wearing a wedding ring but that could simply mean he didn't wear one.  Unknown date and place.