I have friends who work on various make up counters in department stores, big brands, high end. Quite a few volunteer to go to the cancer wards bring free make up supplied by the companies(French brands), they do make overs demo how to do techniques. Bring free make up to give to the ladies. There is no selling and in fact very few know many of the make up brands do this. They say how uplifting and rewarding it is.
Oh and they wouldn't dream of trying to sell anything from their brands whilst there.