When we do a cooking rotation, we don't have a designated workshop. We just use our small fellowship room that has a very small attached kitchen. We had planned a cooking rotation a few months ago and lo and behold no one told me in advance that the oven there was "dead". So we just had our "shepherd" take the items down around the corner to the "big kitchen" to cook. So that may be an option for you, too.
ALL our boys and girls love the cooking rotations!
Jan @ First Pres. Napa CA