Some of my friends and I do quite a lot of Day Centre and Care home gigs in Edinburgh. We all met through going to Scots Music Group's (SMG) excellent classes, from which many firm friendships and musical collaborations have originated. Our parent organisation has been through some financial tribulations, so any money we raise goes to SMG and not into our own pockets, by agreement with all playing. As Tone says, most of these places have entertainment budgets, if not able to pay commercial rates (we are all amateurs anyway).
We have a programme of tunes and songs, and also take song sheets along, so that more folk can join in: and we ask in advance if there are any particular favourites they want done. (Had to learn Mountains of Mourne for an Irish lady!)
Sorry we are too far away for Claire M.

We also incidentally do official busking around various Farmers' Markets in the area, and some gigs for City of Edinburgh Council events. Again, any money raised goes to SMG funds; even those players who travel some distance have declined any fuel expenses. ( the one exception being a trip to play in Ayr, 70 miles each way).