With Mazo and Sliwinska's wedding less than a month away, the two arrived in Sin City with their guests on Saturday and got situated in their suites at the Planet Hollywood Hotel before splitting into groups for the separate bachelor and bachelorette parties, People reported. While the girls had drinks at Heart Bar and -- not surprisingly -- danced the night away at the Palms' Moon Nightclub, the guys had fun on a party boat at nearby Lake Mead.
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