Marrying in a church despite not being religious

I'm doing a research project on marriages in Hong Kong, and how they have evolved from the traditional chinese wedding. One of the topics is the wedding venues. Churches are quite a popular choice for the wedding ceremony, even if the couple are not religious, and I'd like get some responses on some reasons why people still do opt for a church ceremony.

If you yourself have done the church wedding ceremony, a reply would be really helpful, as well as how else you did your wedding. Thank you very much. :)