Katia Lekarski loves to attend weddings, but doesn't get invited to as many as she'd like. Figuring that there are other people like her, she created the app Invitin. This app allows people to invite strangers on the internet to attend their weddings in exchange for ticketing fees. The Guardian explains that couples can sell these tickets to defray the costs of their special events.
There is a screening process. Guests must abide by a dress code and event organizers can vet them by their profiles prior to approval. But it is otherwise a straightforward process to attending a wedding.
-via Dave Barry | Photo: outreachr on Wikimedia Commons