I have an el cheapo charcoal grill from Wally World, and I use Mesquite chunks for fuel instead of charcoal. Also, I don't use lighter fluid -- I use those wax brick thingies. I just break them up, distribute them amongst the chunk pile, and light them up. The chunks catch fire and burn down just like charcoal.
Then I spread them out and grill steaks, burgers, or whatever as normal. When I'm done, I have a nice piece of grilled meat with some Mesquite flavor cooked in.
Has anyone else tried this?