For DM, Ravi and I, dice inevitably happens at the end of the day, usually on Friday or Saturday, once we've had time to do everything else for the day, get our ducks in a row and whatnot. This way, when we finally sit down to game, we can go as late as we want and our schedule for the next day allows. It could be midnight, it could be three, four, five in the morning. It all depends on what time one of us needs to be in bed, how much fun we're having, and how much material the DM has for that night. There's one other factor, though: the game is almost over when the clock hits "Loopy".
I can't remember where the term "Loopy o'clock" came from, but it's a familiar term for our gaming sessions. Do you remember this post? This is what happens at Loopy o'clock. Someone gets the giggles, and the giggles are infectious. The other will start laughing, DM will inevitably say "Calm down, it wasn't that funny," and we end up laughing harder. The later it is in the evening and the longer we've been up, the more likely it is to hit the magic hour. There's nothing standard that sets it off, either. The setting can be completely serious or lighthearted, mid-fight or in-game downtime; it can be something said in-character, out-of-character, a roll gone wrong, a roll gone RIGHT, anything with the slightest bit of humor in it. Most likely, it's something that at an earlier time would not have sent us flying into fits of laughter. That's what Loopy o'clock does: the funny get funnier. It brings several minutes of game distraction (sometimes to the point of ending the game early), LOTS of snorts (What are we up to on your count, Ravi?), and that feeling of lightness that comes after tears roll down your face from laughter. It gives you a high you can get while still being completely sober, and it feels good, man. Sometimes we can pull past the magic hour and keep on playing, but more often than not, Loopy o'clock marks time for the game to be slowing down so we can get some much-needed sleep.
So the next time you sit down to play after a long day, the hour draws late and a giggle fit descends upon your game, check your watch - it's Loopy o'clock.