AKA - Two Kettles
What about a village hall for a Saturday afternoon? something like ( http://www.swmh.btck.co.uk/ ) probably £50 to £60 to hire. Parking, stage, no noise restriction (during the day) Nice pub round the corner. Bring your own kit, Book the stage for a session. Probably need some additional kit. Running around, Donation to a charity etc. Say £250 all in. Can't be that hard to get together can it?