What it means, of course, is that "The Real Cancun," which bills itself as the first reality feature film, follows the formula pioneered by producers Mary-Ellis Bunim and Jonathan Murray of television's "The Real World": Make certain your casting and choice of location will deliver exactly what you want. No, you cast extroverts whom you then fly to Cancun, Mexico, put them up in a luxury hotel where free booze flows, herd them to every major club and party in town, and there is no chance that naughty things won't happen. Given the current appeal of reality TV and the fact a movie can show the R-rated stuff missing from television, "The Real Cancun" should pack in partygoers.

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