A: Even if Ozzy is walking you down the aisle, live rock isn't really the way to go that early. Instead, pick a sound that's more soothing and that complements your site. "If the place is light and airy, like a country club, a jazz band with a vocalist would work well," says Marc Jason, of Total Entertainment, a New York company. If your venue is a catering hall or a hotel ballroom, which lends itself to dancing, Jason suggests a scaled-down orchestra (7 pieces, versus 10 with a horn section). Start with smooth tunes (like Norah Jones, Diana Krall, Ella Fitzgerald), then switch to rock later.