My parents are members of several museums and societies in their large city. Now normally the member benefits provide tickets and passes multiple times per year

My parents are members of several museums and societies in their large city. Now normally the member benefits provide tickets and passes multiple times per year that present opportunities for locals to visit the museums "for free" because they are already paying members. (There are also free days for everyone.) But my parents are part of that sizable minority of members who never go to these places on their own. So every time I visited home, there would be an appreciable pile of passes and vouchers on the mantelpiece, and Mom and Dad would encourage me to take a friend, or my sister, and have an outing with the free passes, so we could at least use them up. So this is the case in my family. Now I can see where people who love visiting museums become members in their own towns, get free passes, and visit there often, right in their backyard. I can also see people becoming members because they love entertaining visitors and they can show those visitors a good time if they have a supply of free passes on-hand and ready for when someone new comes around.