Phone local churches... Most of them have pianos, and would be more than willing to organise a little concert for you, providing the admission fees go to the church, or something like that. I have done that a couple of times (even though I'm Jewish)... There's a church where I live that is really close to a big office building, and people know that every thursday they have a free lunch concert, so they come... and all I had to do was just volunteer to play, and they did everything... It was nice.... a 30minute programme...
Also, giving 'home concerts' can always be fun - if you have a grand and enough space to host more than 15 people or something like that....
cheers... Amit