Razor Edge

From the introduction:

It’s a typical night around the table until Tommy shows up with a mystical gem. It seems to glow and pulsate, its presence drawing everyone in the room. All at once, your hands reach out to grasp it, and as you do, your group is violently transported to another world. Materializing on a hard metal surface, floating through an abyss of space and sound, you see your friends dressed in a variety of denim spandex and neon color. Before you, approaches a man of plastic with long, dark hair, a large smile and outstretched arms. “Welcome to Razor Edge, we’ve been waiting for you.”

“What is this place!” you inquire.