If youre worried about attending a ceremony in a different religion or culture than your own, dont worry. You will most likely not being the only outsider there, and the primary thing the bride and broom will care about is your presence. These days, a religious wedding ceremony is generally open for those of other faiths to attend, and you can participate in as much or as little as you choose. Religious leaders are accustomed to the fact that there will be people of many faiths attending; thus they generally tend to explain what is happening, and what the congregation is expected to do. If youre worried that your own religion wont approve of you attending another worship service, speak with your religious leader. In the event its not appropriate for you, you can probably skip the ceremony and attend only the reception.
Heres a quick rundown of things guests might encounter at a religious wedding:
Catholic: Most weddings include communion, which is offered only to those who have received their First Holy Communion in the Catholic Church. If you arent Catholic, stand so that any Catholics in your row may pass, then sit back down and wait quietly.
Jewish: The wedding service is often in Hebrew, but if you dont understand the language, try to enjoy the spirit, music, and company around you. Men, no matter what their faith, are generally expected to wear skull caps or yarmulkes inside the synagogue. Youll most likely find them being given out just outside of the doors.
Muslim: Most Muslims do not have a public ceremony, only a public reception.
Mormon: Most Mormon wedding ceremonies are restricted to only practicing Mormons. Dont be offended if you arent invited to the ceremony.
To add to your comfort level, why not ask the bride and groom to give you a brief outline of what to expect on the day of the wedding. Or, you can read these links for general overviews.
Jewish
Muslim
Protestant
Catholic
Guide to Indian Weddings of many faiths, including Gujarati, Tamil, Muslim, Bengali, Sikh, Jain, and Rajput(scroll down to bottom to choose links.)
Chinese Wedding Traditions
FAQs for guests attending a Chinese Wedding
Be sure to check out the about.com Wedding Traditions site for more about traditions.

