An Argentinean-born singer and guitarist on the D.C.-based ESL Music label -- named after the Eighteenth Street Lounge and home to Thievery Corporation -- Aubele makes some of the coolest music you've never heard before. Whatever you call it -- electro-tango or world chill-out most likely -- it's an intoxicating, smoky blend that soothes the soul and puts your mind at some sense of temporary ease. It's a musical narcotic. His U.S. tour in support of the new set Berlin 13 kicks off right here Monday, April 25, at 8:30 p.m. Rock and Roll Hotel, 1353 H St. NE. Tickets are $15. Call 202-388-ROCK or visit rockandrollhoteldc.com.