By Andra Zeppelin, Special to The Denver Post Down an alley between Second and Third Avenue in Cherry Creek is the entrance to the newest speakeasy in Denver. Stair 3, a sign says, and a golden-speckled door bell facing the construction site across the alley gives the only clue to B&GC’s covert location. Another new speakeasy — a modern homage to the illicit establishments that popped up during Prohibition — is Uptown’s Retrograde.