Do you entail insurance to hire out marquees to the public or is in that responsibility?
Answers:
You can define "responsibility" surrounded by a contract with the citizens you are hiring out to and make it their "responsibility" to insure it.
In broad if you are a business you should at least buy a broad liability policy. Find an agent and they will ask you the specifics of what you are doing, the amount of receipts you expect of the year, what limits you want, etc... and you should be apposite to go and probably for a minimum premium, build the cost of insurance into the agreed excise with your customers and you are well brought-up to go.
if you have any species of property that could pose a health peril to members of the public it would be surrounded by your interest to have a Public Liability Insurance cover. Given that a Marquee is something you hire out to differrent ethnic group at differnet time who mount it in different locations you may bear out a general Public liability within surance cover.
you may decide to build the extra cost into your hiring fees but insurance indemnifies you against any actionable losses and you will own peace of mind.
"Need" is a relative term. If a marquee is a billboard, and you own the stop it sits on, then no, no governmental authority is going to product you buy insurance. Likely the people public relations on it won't, either.
If you LEASE the environment it's sitting on, likely your LANDLORD will require you to get liability insurance, naming them "additional insured - landlord". If you borrow money from the wall to pay for the billboard, later the bank will require you to take property coverage on it (fire & wind), as it's collateral for the loan.