Does playing for a small amount of time on your last day affect your ADT?

In general, no, it's not going to lower your ADT. And the reason is that if you're staying on a hotel offer in the land-based casino, they know you're staying for x number of days. So that last day is going to count whether you play or not. Similar for cruise ships; they know you're on a seven-day cruise. So if you take two days off and think, "oh, they're only going to divide my play by five instead of the full seven," that's not the case, they're going to calculate the full seven days. At land-based casinos, be cautious about dropping in and playing for five minutes. Lets say, on average you're playing, $400 in theoretical per day, and you show up you play for five minutes and you get a 2 theoretical, then that can obviously bring down that 400 average quite a bit which will affect your offers with that casino.