Experienced DJs can push a room's temperature to equatorial extremes, and the effect intensifies exponentially when they infuse genuine tropical sounds. When Omaha's Brent Crampton and 1924 Main's resident spinner, Tyrone Blea, team up for Friday's free "Summer Samba," the heat waves could encompass several blocks, register on Doppler radar and ignite any unstable substance. (So go easy on the hair spray and alcohol-based aftershave.) Crampton promises "Latin grooves, Afro-Cuban, cosmopolitan house and vibrant, sun-soulful rhythms," a combination so combustible that the venue's sprinkler system might douse the already sweat-soaked dancers. Next month, Crampton starts spinning for students as part of Red Bull's Omaha-area music academy program, and his relentless sets suggest he's already guzzling complimentary cases of the energy-boosting beverage. For clubgoers looking to get into the act, authentic South American moves are hot, but honeymooning-tourist attire remains lame. The usual shiny shirts will be fine.