A man was robbed of his $11,000 watch after he went to a Brooklyn hotel with a 230-pound woman he’d just met — and instead of showing him a good time, she slipped him a roofie, cops said.

The unidentified victim was so enthralled with the thief, whom he met at a bar, the two went to the Hotel Le Jolie on Meeker Avenue in Williamsburg.

The woman offered him the drug-laced cocktail and he passed out, cops said. He awoke the next morning to discover both his wristwatch — and his date from the night — were gone.

The watch thief is white, in her early 30s and an estimated 230 pounds, cops said. She is still at large.