The season of beards, flannel and Carhartt overalls provides a wealth of inspiration for the muskiest of man caves. Put your unfinished basement or cobweb-covered attic to use with a few simple stylistic touches. Local vintage shops have all the necessary staples: nostalgic knick-knacks, stuffed dead animals and rusting tin cans. Relax into a horsehair-upholstered chair, pour a highball, light a pipe and soak in the testosterone.