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The strip club cavalry has arrived in Chicago with THOUSANDS of dancers, literally, making sure NBA superstars and fans are well entertained during All-Star Weekend!!!

The good folks at Ocean Gentleman's Club, Factory and Club O tell TMZ Sports ... they've hired Last Coast Entertainment to promote events at all the clubs this weekend. We're told that means 3,000 strippers will be swarming around poles all over Chi-town.

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The forecast calls for some serious rain, because we're told each club will have $450,000 in single dollar bills on deck each day for customers -- NBA and otherwise -- to spend on the dancers. The clubs are ready to bring in the Brinks trucks too, if they need even more Washingtons.

As for who's leading all this fun ... Offset will be front and center hosting an epic after-party Sunday at Ocean Gentleman's Club, following the All-Star Game. Also, Kid Capri's hosed that club's Saturday night bash.

The clubs also tell us they already have 10 tables reserved each night, exclusively for NBA ballers -- and their kitchens will be working OT to serve up lamb chops, burgers, wings and shrimp. BIG dudes have BIG appetites!

BTW, NBA All-Star Weekend is like an annual Super Bowl for the strippers ... so there's high-demand to get work in the host cities each year. We're told the dancers have to fork over $300 to $350 per night to a club just to get their high heels in the door.

Other gentlemen's clubs around Chicago -- like Scores and Rick's Cabaret -- are adopting NBA themes. Dancers will wear basketball uniforms, to start anyway, and of course, there will be VIP sections just for NBA studs.