Although they don't use briquets, I highly recommend Safari grills/ Qwik Grills. They use crumpled pieces of newspaper and work really well. You can only find them on Ebay, these days, but they're well worth it. The food comes out just like it's grilled over charcoal and all it takes is between ten and twenty sheets of newspaper. It does not work for thick cuts (I used it for burgers, thin steaks and satay type kebabs). The only real downsdie is that they are made of very thin metal and they just don't last. I am being particularly careful with my latest acquisition, keeping it out of the rain for starters, and using fewer sheets of newspaper at a time so the flame doesn't get so hot. If this one wears out, I will have one made of better materials.
http://users.aristotle.net/~shicks/qwikcook/index.html
Sasha