A Day Out with Old - discount
Attraction parks, museums, zoo's, theaters; a fun day out, but usually expensive for the average 20-30 year old. Why not introduce a Day Out with Old-discount, whereby tickets are cheaper when a young adult brings an older person with them? Fun for both parties, and commercially attractive. The costs of care for the elderly drops due to the diminished loneliness amongst older people, amusement parks etc get more visitors and young adults get discounted tickets and meaningful contacts with their grandparents.
Business case for the 'Stedelijk Museum' in Amsterdam: 30.000 euros more in revenues.
Based on a 30% discount per ticket and 15.000 euro implementation costs, they expect (based on other promotions) to sell 9000 more (discounted) tickets. They expect these sales to cannibalise their normal sales with 4000 tickets, but that still means an additional revenue of 30.000 euros. On top of that: more sales through food/beverages ed.
Maybe launch through a nationwide 'A Day Out with Old-discount' week?