Sen. John Fetterman may be allowed to dress like a slob in the halls of power — but it’s still a capital offense in New York City’s finest restaurants.

Intrepid Post reporter Jon Levine learned that hard truth this week when he crisscrossed the Big Apple’s culinary landmarks wearing Fetterman’s trademark hoodie, gym shorts and sneakers and tried to gain entry — only to face scorn and mockery from maître d’s with more common sense than Congress.

“He would not be permitted here,” sniffed a maître d at Daniel on the Upper East Side, where a seven-course tasting menu runs $275.

She admitted she didn’t know who Fetterman was.