I've thought of doing this.
How much $$$?
$33 a month, or $5 a session.
This particular place focuses on practical combat, both armed and unarmed.
We did this exercise called "the knife game". 2 people sat back to back with eyes closed. Instructor throws a plastic knife on the ground, and whoever can reach it first and perform a knife angle on their opponent (stab, slice or whatever) wins.