Organizers expect some 30,000 revelers and reggaetón-rousers tomorrow to swarm to the central Pacific coast's Jacó Beach Music Festival. Puerto Rican reggaetón's crowned king himself, Daddy Yankee is scheduled to bring his best songs, “La Gasolina” and “Lo que pasó pasó” – which for some have become booty-shaking party anthems and, for others, ear-piercing rants packed with questionable sexual innuendos.

There's no denying, however, that reggaetón, in much of Central America, the Caribbean, and in the U.S. and E.U. enclaves inhabited by the young émigrés of those regions', is by now a ubiquitous and insanely popular phenomenon. It's Latino culture and the Spanish language consuming all that is bold about Jamaica's dancehall reggae and the United States' boastful hip hop.

In the fashion of the latter style, breakdancers will be on hand, poised to battle on the dance floor. So will DJs, lined up to spin varied electronic styles as well as live music by Sasha Campbell, Le Pop and Tapón. There will also be a slew of arts and crafts, a massage area, a tea room and a climbing wall. The event is expected to last up to 12 hours, with some DJ sets scheduled to begin at 3 p.m.

Part of the proceeds from ticket sales (¢10,000 in advance, ¢13,000 day of) will go to help start a lifeguard program on Jacó.

Tickets can be bought at the Web site www.mundoticket.com, by phone at 207-2025, or at a variety of Servimás counters around the country.