A few weeks ago, after a Friday lunch at Nana, I posted an inquiry about other places in Park Slope that are open for lunch on weekdays. (Sometimes this is my only chance to go out without my urchins, er, I mean, my beloved children.) "Budino" posted some ideas, including Press 195, Cafe Mexicano, Olive Vine, and 200 Fifth for burgers.... I found some other Park Slope places open for weekday lunches:
Bistro St. Mark
Bocaccio Grill (when it re-opens)
Ginko Leaf Cafe
Los Pollitos II (Fifth Ave.)
Maria's Mexican Bistro
Tacos Nuevo Mexico (and, I think, Taqueria D.F., if it is still there)
BTW, I'm not necessarily vouching for the quality of any of these places. I'm just reporting that they are open for lunch, if anyone is interested.