For me it'll take more than a free sarnie and them changing the decor of the showroom, to make me spend anymore money there.
Now if they had properly trained mechanics (Not just ones who have worked on Micras and they are japanese, so it's all the same). If they had sales and service staff without a holier than thou attitude and if they bothered to order in the parts or even do the work as promised and communicate when they have an issue. THEN i might consider going back to them.
Plus why do their cars seem to be a helluva lot more expensive than other dealers??
Just my tuppence,
Ian