Well its unfortunate that no one answered this topic in time.
If you ask me, theres nothing wrong with eating out and having the chips, you said it yourself you hardly ever eat out. Dieting and weightloss has to be enjoyable for you. If you dont eat foods you enjoy as well then your going to get those urges every now and then.
Have Vodka with a diet mixer if you want to let the calories go down a bit. Just make sure you take note of how many calories per standard drink. Im pretty sure it has it on the bottle.