Men in pork pie hats

Bryan Cranston as Heisenberg on AMC's Breaking Bad

Dexter Gordon photographed by Herman Leonard via Jackson Fine Art 

Johnny Depp channeling Charlie Chaplin (and Buster Keaton who also famously wore a pork pie hat) in Benny and Joon (1993) 

Jake Shimabukuro via Second Hand Sounds

Saxophone legend Lester Young

Korean star Yoo Ah In

Your eyes might think it's actor Alan Cummings in a pork pie hat, but it's really Robert Downey Jr..  If you've never seen an actual pork pie, it looks like this.