The 1920s have come roaring back at the legendary Arizona Biltmore, A Waldorf Astoria Resort, with the re-creation of the resort’s original Mystery Room — the secret ‘speakeasy’ where guests clandestinely imbibed during Prohibition. The fun times of the era are being relived every Sunday from 8 to 11 p.m. with period music and cocktails in a signature setting defined by the distinctive architectural style of Frank Lloyd Wright. Enclosed in Wright’s original Biltmore Blocks with a restored gold-leaf ceiling, the room sports a bartender in period attire, plays music of the era, from Charleston dance hits to jazz riffs, and serves historic cocktails. Admission is free but, like the security measure employed at speakeasies of the Roaring ‘20s, a password is required. To obtain the password, search #speakeasy on Twitter — the resort will tweet a clue every week from its Twitter page, @ArizonaBiltmore.