EXCLUSIVE

Footballs won't be the only thing bouncing for the Raiders if they move to Vegas ... 'cause one of the biggest strip clubs in Sin City is promising free lap dances FOREVER to any member of the team.

We talked to the good folks over at Sapphire ... a Vegas mega club where celebs like Rihanna, 50 Cent and Katy Perry all party ... and they told us they have some silicon-filled incentive for the team to move.

"Sapphire proposes that if the Raiders do indeed relocate to Las Vegas, all team members will receive free lap dances and limo transportation at the best-voted, world’s largest, and most iconic gentlemen’s club in Las Vegas."