Does coffee make a good rub for meats when mixed with other spices? Which spices work best with it?

Its not unlike me to add some coffee to the brine for a pork butt or shoulder either.

I had the best steak at a restaurant recently. Here is a list of ingredients in the rub they use, and sell. Ground coffee, sea salt, brown sugar, smoked paprika, black pepper, garlic, onion, cumin, coriande and cacao.
Best steak I e ever had!

In a texas barbecue or brisket rub. Goes with the usual suspects - oregano, cumin, chili. I use one of 2 recipes by Ari Ehite (I think from San Antonio, now cooking near New York) and Tim byres (Dallas chef)...easy to find on web.

Good question,
I don't eat animals, but I'm a coffee scientist...
Maybe a mix of orange, lemon, or cranberry with a lighter roast coarse grind.
You could also try cinnamon, honey, pepper, cayenne, cocoa...