The pleasure shared easily often depends on somebody noticing practical details beforehand.

Ease is manufactured. An afternoon that feels spontaneous usually had somebody checking the weather, bringing the extra jumper, working out where the toilets are, remembering that one person cannot eat this. None of that is visible during the good part, which is the point of it, and it means the person who did it is the least likely to be thanked. The smoother something feels, the more preparation is generally hiding underneath.

Work out who does this in your circle and say what you noticed, specifically. And take a turn at it yourself, which is the fastest way to find out how much of it there was.