I often pass the lobster tank in my grocery store. Will actually DO something about it, some day.
As to the mussels, they're a favorite of mine, and my Dad too. Took him to this, now closed Brasserie in DC, and posting this 'review' for old times' sake.
'The Washington branch of this French steakhouse and brasserie, which also has locations in New York, Miami and Tokyo, is lively and lots of fun. On warm days, the umbrella-shaded tables make the large front terrace a prime location. In inclement weather, we like the comfort of the turn-of-the-century Paris brasserie setting with its pressed-tin ceiling and mismatched lighting fixtures. Les Halles is the kind of place where you soon discover things you like so much that you never order anything else, such as the hanger steak served with the best pommes frites in town or the homemade shredded pork confit. If you want a real dinner bargain, the steak frites-salade platter is excellent. Desserts include splendid gâteau Basque and crêpes Suzettes.'
The steak with pommes frites was GREAT! And the mussels with red sauce, our favorite, was FAB! I'm often disappointed if mussels DON'T have a deep red sauce, so I rarely order them.
Found these recipes, for mussels and marinara:
http://www.myrecipes.com/recipe/slow-cooker-marinara
http://www.myrecipes.com/recipe/slow-cooker-marinara