Stay away from that location. You don't need any extra issues to deal with. It is perfectly acceptable to contact your sponsor and say, "on second thought, I can't meet at X place. Could we meet ___ instead, or at another place more convenient for you?" I think if you make a specific suggestion and are open to another possibility, you are not making it difficult for you. I think you'd be showing her you are taking care of yourself, which is a good thing in general and in the specific context.