The whole "reserve the chairs" thing is ridiculous and should not be allowed full-stop. I have noticed that Americans and Russians in particular have an obsession over this- waking up at 4:30AM to run down and claim "their" chairs. What kind of vacation is that?
If I arrive now at a place with this type of reservation policy I check out and go somewhere else the next day- I don't need this aggravation in my simple life.