We covered basics for these through college, but after they graduated my kids took them on. When youngest and wife lived with us through Covid they kept paying them. We mainly covered room and board, but also paid if we went somewhere that cost $$, like the movies. Had we not paid, they would not have gone. It was our splurge, not theirs. They allowed themselves one splurge monthly - going out to eat together on the monthly “day” of their wedding anniversary (they picked this tradition up from H and I). They paid for that. The rest of their money they saved to buy their current place or used on some needs if those came up - no wants that I recall.