Jon Gosselin's a Stripper Now

Jon Gosselin will make his debut as a stripper at a club in Caesars Atlantic City.

Management at Dusk Nightclub tells us ... the former reality TV star got involved through friends who are running the show -- called "Untamed Male Revue."

We're told it's burlesque-style, a la "Magic Mike" and "Thunder From Down Under." It's not a "hump your face" kind of thing.

Jon will be stripping down to his undies ... sorry ladies.

Jon's been rehearsing for a few weeks, even working out.

By the way ... the show debuts on April 1, Jon's birthday. No, not a cruel joke.