From its self-titled debut to the new Contra, Vampire Weekend has maintained a consistent sound -- a melting pot combination of Afro-pop, British New Wave and even some Western classic music. Ultimately, the band sounds like Paul Simon if he were less stuffy and also stricken with A.D.D. It's more playful, but also more jumbled. Two opening acts. Saturday, Sept. 11. Doors at 6 p.m. Merriweather Post Pavilion, 10475 Little Patuxent Parkway, Columbia. Tickets are $35 to $125. Call 800-551-SEAT or visit ticketmaster.com.