I've visited Marseille a few times now for a nice meal before a show. While they are popular, I have not had problems getting reservations. Also, even though while they have a French influence, they have enough American food on the menu to not make it inaccessible. Throw in that they have great food and get you out the door in time for curtain and it's a perfect spot.
Special: Butternut Squash Risotto
The Mr. went in for the burger; my father ordered the Pasta Pesto, his staple; and I split the Mussels & Risotto with my mother. Mind you that the mussel plate pictured above is POST split. It is a huge helping of Moules Frites! We were all more than satisfied with the food and we all traipsed off to our show very satisfied.