Give away the cost of a (free) museum ticket

In the US, tomorrow is Museum Day, which translates into free admission at many museums. Details are here: http://www.smithsonianmag.com/museumday/. So the suggestion for today is to enjoy a visit to one of the participating museums, but use the money you would have spent on a ticket in a charitable way. You don't have to be in the US to take part. Anyone can visit a free museum or other entertainment locale, estimate how much a ticket would have cost and give away that amount. Through the magic of creative accounting, you're no poorer than you would have been if you'd paid to enter the museum.


Effort involved: some. But you get to check out a museum you've been meaning to go to, as well as support an organisation (or busker, whatever) you've been meaning to acknowledge.