A majority decision strategy would be most effective in this situation.
Explanation:
The concept of majority is a system of judgement which chooses alternatives that have a majority, which means more than half the votes.
It is the conditional decision concept used in leading policy-making bodies most often.
The majority oppression (or collective tyranny) is a flaw that is undoubtedly implicit in majority government, in which the majority of voters seek their own interests at the expense of those within the minority exclusively.
So in this scenario , the restaurant management should take everyone's decision and the majority should be executed.This is the best choice to take quickly.