treat the whole thing as an experience in the mtns, they almost certainly aren't going purely to maximize their skiing laps. they're likely to equally enjoy the views, the accommodations, the apre, the people watching...just being Out There
bring all the good gear you have and offer it up, i've saved many a casual skier's day by lending them a nice warm dry pair of gloves, goggles, jacket whatever
bring snacks/beers/whatever might enable a morale boost when needed
keep a look out for your people and make sure theyre comfy with their equipment, aren't feeling left behind etc