In the kitchen area, we put in stainless wall panels and all the stainless kitchen work stations. We also built custom perforated stainless steel shelves suspended from the ceiling. Stainless light boxes were built for the light fixtures.
In the service area, we took regular mild steel and blackened it and then had it powder-coated in a semi-gloss clear. Those steel parts are the twenty-plus foot long counter, coffee cove area, condiments counters...and the back wall panels and shelves behind the counter. (Some shelves are walnut but the metal ones are ours.)