Venerable Detroit Golf Club was founded 1899, and so there has been no small amount of tradition established over the years.
One tradition – no denim – is getting disqualified.
Detroit Golf Club Board of Directors notified club members in an email that denim – "defined as a coarse, twilled sturdy cotton cloth used for jeans" – can now be worn on club grounds.
With limitations, of course.
Jeans "cannot be ripped or torn," the email states, and "any denim worn must be tasteful and appropriate for a club environment."
Denim is not allowed on any of the golf facilities, and it also is banned in the ballroom and other banquet/meeting facilities.
Finally, DGC members and guests may not enter the clubhouse through the front entrance in jeans: "The Professional Shop or side entries may be used."