If you're looking for a nice, romantic evening I definetly recommend eating at the Old Spaghetti Factory in downtown Louiville. The atmosphere is warm and friendly...very inviting, and the food is delicious! I love the chicken parmesian and find myself ordering that everytime we go! Although great for families, the setting is also romantic and intimate...so much so that my husband proposed there!
After your meal, follow up with a nice horse carriage ride. Horses and drivers are usually easily found outside the restaurant and provide options for rides. You can chose a ride around the town or go for a more romantic ride down by the river. I've done both, and both were wonderful!
Enjoy your night! :)