Charity Donations

I'm just back from a networking breakfast (how many of these posts revolve around me eating & drinking somewhere???) and an interesting thought came up... The breakfast is £9 and the hosts asks that rather than give change that the £1 goes in the pot for charity. Today we raised £50 which seemed a lovely bonus from an event that is not 'fund raising' in the traditional sense. It posed the question whether I should try something similar - if each transaction - each reprint, wedding booking, portrait booking, etc that went through the business carried an optional £1 donation, which my business then 'price matched', we would get to a reasonable size donation without a great deal effort or pain!

But of course, people like the choice of where their money goes and it can put people on the spot if a donation is asked for... so what do you think? A great fund raising idea or best not to mix business and charity / fund raising? Do let me know...