Hi LucyA,
True, though generally when the elder who is the marriage celebrant meets with the engaged couple and goes over the arrangements before the wedding (everything from their spiritual standing in the cong, who will be in the bridal parties, details of the reception, booze, music....) He will mention that if they are approved to use the kingdom hall (there could be no better place than our fathers house of worship) then there are costs associated with that. They can show their gratitude and appreciation by making a donation to cover those costs and arrange a spring clean of the hall in the week of their wedding.
Cheers, Mattieu.