There is confirmation that, as reported by ProfNowlin at LeonardCohenForum (see OK, Make That Leonard Cohen, His Famous Blue Raincoat, And His Cowboy Hat In Dallas), Leonard Cohen indeed donned a cowboy hat during the encore of his Dallas concert.1
This excerpt is from Live – Leonard Cohen @ Nokia Theatre by Stuart McAfee at Radio UTD (April 5th, 2009):
Cohen donned a cowboy hat for his final number, flirtatiously declaring “I’ve tried to leave you a hundred times…” Afterward, he gave the audience his humble gratitude and leapt from the stage one last time. He gave everyone a lot to remember.
Nonetheless, no photos or videos of “Hoss” Cohen have surfaced online.
_____________________- Brian, AKA ProfNowlin, goes on in a comment at Heck Of A Guy to clarify that
… the hat in question was not some J.R. Ewing monstrosity as large as a sombrero from an imagined Dionysian outtake of “The Lost Canadian” (merging into “Don’t Go Home With Your Hat-On”). Rather, to my eyes, at least, L.C.’s (Texas specific?) costume change involved one of those spiffy black western-style hats that Dylan often wears. It was definitely the closest I’ve ever seen to Cowboy Cohen, and it undeniably added to the raw, unlimbered quality of the performance of “I Tried to Leave You” — almost as if the Nokia Theatre had momentarily become Stubb’s Barbecue. Perhaps someone else who attended the show and who has a better knowledge of headwear can let us know exactly what kind of hat we are dealing with… ↩
Yeah, it certainly wasn’t any sort of outlandish novelty hat… It looked like a fairly modest black suede (or felt) cowboy hat with a brown leather tassel. Something like this: http://caronedmunds.files.wordpress.com/2008/09/cowboy-hat-w-gold-band1-s391.jpg
Haha, that is everything I know [: