I know you mentioned no movies, but you might see (I'm not sure where you are at) about renting out a movie theater at one of these dinner and a movie places. They have low lighting in the theater, they serve dinner, drinks.

Another idea is maybe catch a baseball game.

Or

When I was in atlanta, i was always taking guests to the botanical gardens - I think you can arrange for a speaker or craft session. Gardens are large sisters can go wander about. meet back at the "club house" or most have grassy areas that you can have a packed lunch at.

Progressive dinners are also very positive.