The Harlem James Gang dress impeccably in Victorian/Edwardian garb. Their performances are very well rehearsed. This is a truly serious Steampunk band. The Harlem James Gang had a space on myspace (currently incactive) as well as a presence on facebook (not updated since 2012). They also have a show reel on YouTube (not updated since 2012), which can be seen below. The best resource on the web for them is their home page.
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The Harlem James Gang SHOW REEL
Show Reel