Timbaland -- Post-Separation Party ... With Jay-Z and Lenny Kravitz

Timbaland celebrated his pending divorce last night in Paris -- with Jay Z, Lenny Kravitz ... and 30 ACE OF SPADES BOTTLES!!

The three rolled into Club 79 after Hova's Bercy Arena concert ... and an employee tell us the bottles were worth around $26k -- but they were all comped.

We're told Timbaland enjoyed a "guys night out" while taking pics with fans ... keeping things pretty mellow with the ladies, despite his new status.

TMZ broke the story ... Timbaland's wife filed for divorce this week and asked for the rapper to pay child support on two kids -- one he fathered, one he didn't.