Where's the catch? What's wrong with these so-called "guests". My best guess is that it must be a weekend outing from a home for bewildered old folk. Otherwise, what kind of people are they that can't find the Carrefour unaided? After all, it is but a couple of hundred yards from the curcuit and so far as I can recall, is quite clearly marked "Carrefour" on the outside. Not too much scope for confision there one would have thought. What other sort of events will they need guiding to? A 24-hour beetle drive in the city centre? 
Will the ability to change incontinence pants be an pre-requistite? Will I have to bring my own dribble cloths? Will they smell of piss and boiled sweets? Will I have to talk to them in a loudly patronising voice? Who's the Prime Minister, deary?
Smokie, I know you said you'll moderate this, but I'm trying to raise some pretty serious questions here.