I have done this a couple of times, but only for special events, like a banquet or potluck. I saved up my points during the day, knowing that the banquet meal would be big. Each time, I still lost weight that week, but all the other days of the week I stayed on target.
Hint: plan your dinner meals in advance. Aim for 10 points or so, and spread your other points out accross the day. You will probably find yourself more satisfied throughout the day, and find yourself wanting to eat less at dinner.
It took me a while to get good at this, so don't lose heart. My first couple of weeks, I found myself making dinners like I had before WW, and was shocked at how many points my usual dinners were. Now, I have surprised myself with some very delicious and filling low-point dinners. Such as: broiled and spiced chicken breast
cut over a huge pile of fresh mixed veggies, with Kraft low-fat Ceaser dressing: 8 points and 3 servings of veggies!