Flex Mussels gets pretty good reviews. It has four stars on Google, four stars on Yelp, four stars on Menupages. So when my boyfriend insisted that I eat a steaming pot of mollusk in exchange for getting to try some of Executive Pastry Chef Zac Young‘s famed creations, I thought I was probably safe. We showed up at 7:55 for our 8 p.m. reservation and were asked to wait. Not a big deal. A couple came in after us and were seated immediately. Fine. Then another. And another. Even though we were standing right beside her, my boyfriend thought maybe he needed to mention to the hostess that we were…