So both extremes are being silly here.
Congrats to the pastors for making the payment for pastor services gratuitous.
Of course, if the wedding chapel is a business, the gays can demand the owners to provide a pastor who will marry them.
How about a gay Justice of the Peace. I believe they are empowered to perform weddings. They can demand all they want too, but there is no possibility of a demand for a Pastor that would be, or should be honored.