Could I go to a buffet...and not gain weight?

I usually eat 1,100 calories a day. For a free day could I let loose and go to a Chinese buffet..then the days following go back to eating 1,100 calories a day.
At the buffet I won't go hog wild...but if I eat a little more than I usually do and not be as strict for one day will i gain weight?

Let's say I did go hog wild...would i gain any weight?
 
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