If you are under 10% BF you should be accustomed to the food regimens eating less for let's say, more than a day or two, or generally, you have to have better-than-average eating discipline/habits.
So, enjoy yourself on the weekend, then do some damage control: a couple of daily fasts or do some calorie restriction (for instance, the food for 2 days eaten in 4 days).
Generally, people pushing their limits (for example, really low BF percentage), learn by trial-and-error how to do "damage control" because we all live in the real world, the social events, treats, etc. are all around us, and we have to adapt. If we don't, we risk to be the foodie-freaks/outcasts that are not "kwel". It's infinitely better to act like in "I'm just that lean without any hard work at all..."