From my experiecne, nothing beats a weekend in a hotel, (there are dozens to choose from)but it must be a place where meals are served.
Eating out is a close second, but it must be place with linen table cloths and reservaions required.
No idea what the magic is, but Mrs loves the opportunity to get dressed, makeup, the whole bit. I guess its the see and be seen phenom.
Walking is nice too, but nothing like a weekend / meal.