Right before the Covid lockdowns started, my husband and I went to Mad Mex Oakland several times in the span of a few weeks. We kept getting the same waitress. She told us that she was really happy to see us because we were polite and tipped well, and that having customers such as us make her shifts a little bit better. She definitely seemed like she was having a rough time. This should have tipped me off that something was "off" with the working conditions there. Then the Covid shutdowns happened, and when we went to Mad Mex for our next visit more than 2 years later, we didn't see her. We both looked for her and hoped that she was now working in a better situation.