Tell him you played a little

"I've played a little but I was never much good." You lie to him.

"Well I don't get many opportunities to play what do you say we have a game?"

"Okay it should pass the time after all."

You play a few racks with him where you win one each, he's not very good and you hold back a lot on both racks and you still managed to win one without trying.

"Watching you show off your cute little butt when you bend over the table sure is making me horny." He reaches into a drawer and pulls out a wad of cash. "What do you say we make the next game interesting. I have one thousand dollars here if you win you get it all and if I win you get it all but I get your cute little body for the night, so win or lose you walk away with a cool grand."