We had a birthday party brunch/lunch for my dad at Luna Park yesterday, and the staff made it so special for him! They couldn't have been nicer or more helpful. Although there is no private room, the hostess set aside an area for us apart from other diners. She helped us choose a selection of brunch/lunch choices for our guests, and provided a custom menu at each place setting. Service was very friendly, attentive, and efficient. Our meals (choice of French Toast, Nicoise Salad, or Grilled Chicken) were all oustanding. The dressing on the Nicoise salad was very good, more lemony than any other I've had, and the tuna was seared perfectly. I'd highly recommend Luna Park for this kind of casual gathering, where a private room is not a necessity. Oh, and the bloody marys were spicy and flavorful, with crushed tomatoes for a really full bodied drink.
(And no, I don't have any affiliation with the place.)