BUENOS AIRES — On a Saturday night in Buenos Aires, hundreds of guests turned out for what might have been the wedding of the season. The bride and groom were all decked out. So were the witnesses, family and friends.

But the altar was actually a stage. The priest’s questions to the couple were not quite what one would hear in a church. The wedding rings were inflatable, the cake plastic and the Bible oversize. It was all a bit burlesque.