I have Tengen Tetris. =D
Lucky.
Here are two...well...blatantly illegal ways to enjoy Tengen Tetris away from your PC.
First, go to the mall and check those weird independent stands. You'll find cheap knock-off pirate systems that plug straight into your TV and contain a lot of weird things like HK originals and game hacks. They almost ALWAYS have Tengen Tetris...not to mention funky names like "Super Player Joystick" or "PSKid."
The second and in my opinion much more enjoyable way is with a copy of NesterDC. NesterDC is as you probably know an emulator for NES on Sega Dreamcast.
The only reason I bother mentioning these two is because they both offer fairly nice "2-player" options since the pirate systems almost always have a 2nd joystick and Dreamcasts usually come bundled with one too.
And we all know how important 2-player is when it comes to Tengen Tetris's Magnum Opus...COOPERATIVE!