Id be worried about having nights off - and I don't think you need to. Just takes a bit of advance planning. When I'm losing well I track everything, even if I've gone over. Keeps me focused on what I eat and keeps me accountable (to myself) for my decisions. And I don't feel like I have to get "back on it".
There's "flexible syns" where you allow yourself to go over. I've never used them but I think you're supposed to decide in advance what you'll have and not go over that so you stay in control and be prepared to have a slower loss (or a gain) that week.