Is "The Real Housewives of New York City" star Bethenny Frankel dating Yankees slugger Alex Rodriguez?

If so, she's keeping mum about it.

"I've been dating a lot of different, interesting people," she said at her recent book signing and Skinny Girl cocktail launch at The Water Club by Borgata in Atlantic City. "I have had the fortune of being single and meeting a lot of interesting people and I'm certainly not ready to settle down with Mr. Right yet. I haven't found him, so I'm not committed to anyone. Just playing the field, as it were."

Various reports spied the 'Housewives' star stepping out with A-Rod -- who was previously linked with Madonna -- earlier this month in Miami.

"Alex Rodriguez is apparently a great Yankees baseball player," she demurs. "I'm not a huge sports fan, I hate to admit."

Bethenny's new book, Naturally Thin -- Unleash Your SkinnyGirl and free Yourself From a Lifetime of Dieting, is on the New York Times bestseller list, and the 39-year-old divorcee says, "Anyone can be naturally thin. Naturally thin is sort of a pun because people think that I'm naturally thin and I'm not; I had to work at it, I had to think about it, I had to become and learn how to be naturally thin. … There are no rules you have to stick to. You have to figure out what works for you in your own life. I don't like to tell people what they can't do. I like to tell people what they can do."