It's all right, my friends really are priests!
Apparently the bartender became suspicious when one of the priests, known only as "Jim", began to tell people that "gay" sex was just fine, and anyone who disagreed with him was a dirty pervert. Also, he claimed, his fellow-Jesuits, bishops, and some of the cardinals agreed with him. He explained that he had prayed a lot, and God had told him "Nice work, Jim! I couldn't have put it better Myself! LOVE the 'bridges' bit!"
The priest then broke into a chorus of "Glad to be gay," and slumped under the table, sobbing into his crème de menthe.
Luckily, nobody spotted this rather obvious hen party!
The bartender - an otherwise unemployable theology graduate - had attempted to engage the party of priests in serious religious discussions, with reference to the Bible, the Catholic Catechism, the writings of 200 popes, St Ignatius, etc. but all that the priests could say was "**** all that, this is the new age of Mercy!"
He therefore concluded that they could not possibly be real priests, and attempted to eject them all, including an overweight fellow called "Rosie". However, he was later persuaded that they were from the new order of secularist priests - good friends of Pope Francis - and permitted them to stay.
"I was truly shocked by their behaviour!!??" said Sister Judy Piranha (L) of the Nuns for Naughtiness.