After I'd been refused F-lounge entry on a Swiss operated code-share with a revenue ticket, I put together a (very nice) lunch to take on board the SFO flight, complete with a bottle of wine.
On board, the MdC was mortified when I explained I'd been told only SWISS passengers received SWISS service, and so I'd brought my own lunch. She pledged to write a full report. And I enjoyed my picnic.