British babe Sienna Miller has great taste. The actress hit Soho hot spot “The Groucho Club” last night with pals. If you are not familiar, this venue is a membership only private club.Opened in 1985 as antidote to the traditional club has now evolved to a “who’s who” crowd. Ironically, the name of the club was inspired by one of Groucho Marx's quips; "I don't want to join a club that will accept me as a...