1) Donate blood.
2) Grocery deliveries for elderly neighbours who don't want to go out.
3) Unofficial meet-and-greet at Birmingham New Street Station.
4) Community improvements - cleaning up litter, wiping down bus stops, etc.
5) Opening up and Cashing up assistance to local shops.
6) Gorilla Car-washing (just walk down the street with a bucket of soap water and clean the dirtiest cars you see).
7) Write a blog / guide on local toddler and elderly drop-in events. Will mean visiting each one to generate an independent view.
8) Competitive urban transport - see how many different buses you can get on in an hour.
9) Destination of doom - see how far you can get on trains and still get back in the evening, with the added threat of sleeping on station platforms if you over-commit yourself.