Unlikely but your odds will increase if you have your own container.
Restaurants that don’t provide take out or let you carry leftover foods are worried about at least three things:
That take-out cheapens their image as it’s associated with cheap fast food.
That there is an expense for containers.
That they no longer have control over the environment in which the food is stored. If you took back raw mussels and let them stand at room temperature for several hours before eating, might you then try to sue them for food poisoning?
By bringing your own container, you can at least address #2.
Note: If you sneak the food away without asking permission then you won’t have a claim for #3, so many places will turn a blind eye to this behavior as long as it’s not at a buffet style restaurant.