Typically, dressing thematically is reserved for gang members, or trick-or-treaters. For a cohesive overall style without the presumption of wanton violence/wanton cavities, hit All Purpose.
AP's a mid-Wilshire boutique that collaborates with artists nationwide to put out limited runs with highly specific influences -- this fall's being Houdini (the escape artist, not the harbinger of nocturnal freaks). The magic starts with t-shirts depicting old-timey locks, and a palm imprinted with the cocky Houdini-ism, "I Am Amazing"; dressier options're highlighted by Japanese cotton button-downs with removable/interchangeable collars, for greater stylistic flexibility, and the ability to tear away from bouncers before they give you Shaken Baby Syndrome. Accessories include riveted leather wallets that pivot to reveal cash and cards, and silk ties with 60-150-year-old skeleton keys attached, in case you find yourself shackled in an old-timey tank of water.
To encourage loyalty, AP stashes its best stuff off-shelf for regular customers, which you can obtain by shopping there frequently, or shopping there once while adorned with a red bandana and a Nine.