I would only commit to a sprint goal that is doable in the net-working-time. So if the sprint has 15 days in total, minus 3 days of waste, I'd use 12 days as basis for the sprint-scope.
It also depends if the meetings are helping with getting the sprint done.
Issues like these are important to discuss in the retro, since they heavily depend on teams and stakeholders.
You should never ever work late, or show that this would be an option.
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