Could you live without your cell phone? The Internet? What if instant messaging consisted of tapping someone on the shoulder? Or if PDAs, pagers and Blackberry devices no longer existed? Could you call your friends on a rotary phone? Could you rely on your own memory of their phone numbers? Could you give up your iPods and mp3 players and listen to tunes the old-fashioned way, on a phonograph or 8-track player? In short, could you survive on “The ’70s House” (9:30 p.m., MTV), a new experiment in domestic “reality”?

An instructive spoof from beginning to end, “’70s House” invited 12 young people to spend time together in a reality-show setting. Only the producers didn’t tell them they were entering a time warp. As the players enter the door of a “Brady Bunch”-style house, they’re greeted by the show’s hosts, Bert (Bil Dwyer) – think Monty Hall of “Let’s Make a Deal” – and Dawn (Natasha Leggero), a post-hippie queen of mellow. Bert shouts out each guest’s name and astrological birth sign as Dawn invites them to hang out in their groovy new surroundings. The young victims, who expected to appear on “The Real World” or “Road Rules,” seem shocked and disoriented.

And that’s before Dawn instructs them to put all of their modern gadgets and conveniences into a bucket to be placed in the “2005 room.” They also have to dress in period ’70s fashions, including peasant blouses, prairie dresses, leisure suits and other synthetic ensembles. During the course of “’70s House,” the hapless time travelers will be put through a series of trivia tests and the social mortification of appearing in public dressed like outcasts from “The Electric Company.”

Tonight’s other highlights

¢ Entertainment reporters Lara Spencer and Carlos Ponce are host to “Celebrity Weddings Unveiled” (7 p.m., CBS).

¢ The hunks invade on “Average Joe: The Joes Strike Back” (7 p.m., NBC).

¢ Norman Mailer guest stars on “Gilmore Girls” (7 p.m., WB).

¢ The summer replacement series “Fire Me … Please” (8 p.m., CBS) ends tonight.

¢ Etiquette advice from the mother of the world’s rudest celebrity on “I Want to Be a Hilton” (8 p.m., NBC).