Once in a pinch a little back... To start from the beginning, I was planning to make tacos. For flavoring I like to use salsa rather than taco sauce. Was out of it, didn't have time to go to the supermarket, and the store I was looking in didn't have any salsa or taco sauce. They did have A1 steak sauce, though. That turned out to be no kind of substitute. Tangy was the wrong kind of spicy.
Through trial and error, though, I later found that steak sauce works quite well as a ketchup substitute for French fries.
This may or may not be relevant information for your (US) Thanksgiving. I'm just putting it out there.