A quinceañera is a celebration of a girl’s 15th birthday.
http://www.quinceanera-boutique.com/quinceaneratradition.htm
The Catholic ceremony is a mass, and if the people are not Catholic, it is usually held in a church. Then there is a dinner-reception afterward. The Catholic ceremony is very much like a wedding mass, without the wedding.
I haven’t played very many, and I’ve had only two that were not in a Catholic church…one in a park, and one in a storefront church. I’m not sure I’d played any at the time I wrote my books. I played the storefront church a couple of weeks ago.