Ever consider making a dry rub with finely ground coffee. Mix in your favorite spices, maybe some chili powder, some sugar, salt, and pepper. Simply sprinkle over the steaks and pat it in. Let rest at room temp for about half an hour. Either broil or grill the steak 4-6 minutes each side for medium-rare (or preferred doneness).
Here are some suggested amounts:
3 TB finely ground coffee
1 TB chili powder
1 tsp sugar
1/2 tsp each of salt and pepper
If you have a favorite ingredient, you can add it as well or substitute any of the above for your favorite (just leave in the coffee!)