Best Museum restaurants/cafeterias

Now that autumn is here (though it still feels summery) my friends and I like to hit the museums on Fifth Avenue, downtown and Brooklyn.

Do you have any favorites so we don't have to leave the museum when we get hungry? I used to like sitting around the fountain at the Met although the food was too steam table cafeteria style. I like the Morgan Museum restaurant but the food is just so-so.

Thanks for all suggestions.