I used to follow a WW plan many years back that had a "weekends off" option. I think they dropped this pretty quickly because let's face it, it's very easy to do a lot of damage in a weekend! What I did that worked for me was to pick two meals a week where I wouldn't count anything(back then WW had exchanges like protein, starch, etc). It worked for me. I probably was only consuming a few hundred calories more each meal than I normally would, because I truly appreciated being able to eat what I wanted and savored every bite.
Lately I've been having my Friday night dinner as my off meal, but I find I'm kind of gorging, which I don't think is helping me any. It's become like a free-for-all. I'll have 2 slices of Grandma pizza(very thin crust, crushed tomato, not too much cheese and fresh mozzarella) and a glass or two of wine. But then I want dessert, and instead of just a square or two of dark chocolate, I've been reaching for my son's ice cream. I don't have any problem getting right back onm plan the next morning though.
I'm now on Day 3 of a clean eating program, and I won't be doing the Friday night pizza for the next few weeks...think I finally broke through a plateau but I don't trust it yet!