The list of possible fundraisers is truly endless.
One thing worth considering (something we have done several times now, but would never have known about but for a random conversation over a pint of beer) is local council car parks.
Shire Hall in Gloucester has private parking at the facility for workers which, on weekends, they hand over to charities who are allowed to man the car park and ask for "donations" from people using it when they pop into town on a Saturday. We have made some serious money from this unbelievably easy fundraiser.
I have no idea where you are but it might be worth checking at your local council offices to see if they run a similar scheme - trust me, virtually zero organisation required for potentially huge returns!