CZ: never ran into one. I do have some limiting issues with my diet (souvenirs from a bad tick-bite), but I would have loved to try one. Food seems very different to me there now from the last visit I had there (35-years ago). Much cleaner and more business-like (& almost always $20). It felt much-safer too (way-better than DC). Lots of security around (if you looked for them, mostly well blended-in).