Is the car in question for the use of family and friends or actual paying guests.
If it for paying guests,it might get a bit complicated and do you want the hassle,they would probably have to hire a car if they went somewhere else.If you are using the car as an cost incentive,ask yourself if you need that sort of guest.
If it's for family and friends then it makes it slightly different and you may have to resign yourself to being a 'chauffeur' for the duration.