It looks like Tinder just added a new feature to their app called "Plus One" that helps you find a date to one-off events, like weddings. Or if you don't have a wedding to go to, you can sign up and put yourself out there as a potential wedding date.
They say it's something people need right now, because the upcoming wedding season is supposed to be the busiest in 35 years. So get ready for first dates at weddings to be a big trend next year.