Friday

* El Vez, "The Mexican Elvis", at the Black Cat. With Lysa Flores. $15 at 9PM. [Black Cat]

* Radio 4 at the Rock and Roll Hotel with DJ Cale, Statehood and Rubber Bullets. $12. [R&R Hotel]

* Hemingway & Bailey's Bartending Guide to Great American Writers provides a behind the scenes look at your favorite hard drinking writers. "From Hemingway's Mojito to O'Neill's Gibson, from Kerouac's Margarita to Bukowski's Boilermaker, here is the perfect blend of classic cocktail recipes, literary history, and entertaining stories of the famous and the infamous." Author Mark Bailey and illustrator Edward Hemingway at the Dupont Olsson's tonight, free at 7PM. [Olsson's]

Saturday

* We don't think it is a good idea to go to the 9:30 Club during the day, much less at 9:30AM. But, if you dare, there is a huge new/vintage clothing sale Saturday. Cash only. [Brightest Young Things]

* Fight terrorism DIY stylie, with this FBI Code Breakers vs. Criminal Code Makers seminar at the Smithsonian. Daniel Olson, chief of the FBI Laboratory Division's Cryptanalysis and Racketeering Records Unit in Quantico will teach you "the tools of the trade the FBI uses to break codes and ciphers. Participants test their skills on actual criminal ciphers, including the infamous unsolved Zodiac 340 cipher, which has befuddled the FBI for the past 30 years." 10AM- 3:30PM. [Smithsonian]

Sunday

* Last day of A Midsummer Night's Dream at the Folger. $32-$40 at 2 & 7PM. [Folger]

* Dr. Tami Williams discusses feminist and avant-garde theorist Germaine Dulac (1882-1942) and the concept of "Cinéma Pur" at the National Gallery. The talk is followed by a screening of Dulac's 40 minute silent film L'invitation au voyage. All this learning is free at 4PM. [National Gallery]