HIS divorce woes don't seem to be keeping Alex Rodriguez from playing the field. The Yankee star was spotted in two cities squiring two different cuties last week - including one who's a younger version of his estranged wife, Cynthia.

A-Rod stepped out with a mystery blonde last Wednesday night, starting with a cozy dinner at Dan Marino's in South Beach (photo, facing page.) The duo showed up around 9 and shared a "fairly animated" dinner conversation, spies told Page Six. "They looked to be thoroughly enjoying themselves," said one source.

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So much so that the ballplayer and his date left the eatery and walked to nearby nightspot Bougainvillea. There, they sat at a secluded outside table that was shielded from prying eyes by some well-placed shrubbery.

As they got up to leave around 1 a.m., the duo seemed surprised to be greeted by a photographer's flash. "Up until that point, I don't think they thought anyone had noticed them," said a witness.

Once spotted, the gallant A-Rod ran across the street, "trying to make out like he wasn't with her," said the source. Realizing that witnesses weren't buying the ploy, Rodriguez said, "This is nothing. She's an old friend of mine. Leave us alone." They then got into his Mercedes and sped off into the Miami night.

Back in New York on Sunday night, Rodriguez hit the roof of Soho House with a tall Asian beauty with "good hair," sources report. And this time, instead of trying to pretend he wasn't with a woman, A-Rod - decked out in jeans, a white T-shirt and black patent-leather Nikes - was "out-of-his-way nice" to the staff. "He seemed in great spirits," said one spy.

Just after 11 p.m., his date made her way downstairs, with A-Rod following a few minutes behind her. Then they jumped into a hybrid SUV cab and took off.