Get Him to the Greek, opening Friday, is another pushing-the-R-rating-envelope romp from the Judd Apatow factory (he produced), but raunch, it can be argued, is integral. This is, after all, a tale of sex, drugs and rock and roll – of a record company underling (Jonah Hill) ordered by his boss (Sean Combs) to fly to London and escort a stoned-out rock star (Russell Brand) back to L.A. for a big concert.