Just some suggestions, following the country theme - not necessarily what I would want to do. Walking weekends with route maps, sights, pubs en route, graded say easy, moderate and challenging. Maybe they could even offer lifts to start points and back to base. Cycle routes also could be popular. Birdwatching. Offer transport to and from local restaurants or pubs. Wine tasting - many wine merchants would be happy to co-operate. Arts & craft activities especially painting (landscapes). Hope there are the bones of a few ideas here. Good luck.