I'm so stuck in my own daygaming thoughts I didn't even think about night.
At night just say/shout, "You guys look like you're having fun." or "You look like you're having WAY too much fun." Or some other variation. They all work very well.
At night just say/shout, "You guys look like you're having fun." or "You look like you're having WAY too much fun." Or some other variation. They all work very well.