Supporting the community

Is there merit in having “Community” too? I’m thinking about offering customers to add a gratuity to whatever they pay me that in turn goes to a local charity – including a food bank. I also like the idea of stating that an agreed %age of what I earn will be paid to a charity – instead of that gratuity or as well as. If it’s possible I’d like to see if we can have imagery like they have at supermarkets – where customers get a plastic token for each £10 they spend – they then choose which charity it goes to.