Talk about service!

Diddy and girlfriend Cassie's dinner at The Lion on Sunday night was first-class all the way.

The couple rode up in a swanky gray Maybach, and "their driver entered the restaurant first to make sure the couple's table was ready," a witness told us.

Once it was, the duo made their entrance, with Diddy "carrying his own glass of wine," the spy said.

They sat in a back booth and dined on calamari, a burger and the pork chop.

Latest on Legionnaires' in NYC ... Removing LIRR grade crossings ... Mets report card at All-Star break Credit: Newsday

Dangerous heat ... Cyclospora cases to increase ... America 250: Manor of St. George ... Mets report card at All-Star break

Latest on Legionnaires' in NYC ... Removing LIRR grade crossings ... Mets report card at All-Star break Credit: Newsday

Dangerous heat ... Cyclospora cases to increase ... America 250: Manor of St. George ... Mets report card at All-Star break

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