A crowd of nearly 1,000 turned out Oct. 2 at WGBH in Boston for a huge public salsa dance party and sneak preview of the four-hour Latin Music USA doc. The station’s María Hinojosa served as the night’s emcee as fans danced to live performances by Bobby Sanabria y Quarteto Aché and Mango Blue. (Photo: Lisa Abitbol) In related news, President Barack Obama will host a plethora of entertainers in a Latin music night at the White House on Oct. 13, reports The Associated Press. CPB is backing that performance to the tune of $547,000. Among attendees and performers: Marc Anthony, Gloria Estefan, Jose Feliciano, Jimmy Smits, Pete Escovedo, George Lopez, Thalia, Los Lobos, Tito “El Bambino,” Aventura and Sheila E. The concert will be taped to air on PBS on Oct. 15, Telemundo on Oct. 18 and V-me on Dec. 25.