Nic Cage -- STRIP CLUBBIN' with Vince Neil

Wanna know where Nic Cage is spending his hard earned "Ghost Rider" money??

Hint: It's dark, covered in velvet and smells like daddy issues ... Vince Neil's Las Vegas strip club!!!!

Cage hit up Neil's "Girls, Girls, Girls" gentlemen's establishment this weekend following a Motley Crue concert ... and even posed for a picture with the boss man himself.

For the record -- Cage's wife Alice was with him the entire time ... which made Nic's evening really awesome or really terrible.