I think a lot depends on the context.
Some example:
*My sister is getting married in a church.
*A man walking on the street invites me to join a ceremony
*In an attempt to bridge communities there's an inter religious evening.
*Simply out of curiosity, or to learn
*I'm going in an attempt to preach my own faith
...
It all depends on the purpose, different purposes will get different answers. Some other things to consider, will I be expected to join in certain ceremonies (even singing along or standing up and so on)? For example, when in church the priest calls to stand up in honorance of the communion, and I remain seated, will that be interpreted as disrespectful? Maybe it's better not to go in the first place then.
Salaam Abdul Fattah,
I understand what you are saying. Where people would not attend at a relgious function not of their own faith, on general principle, other might depending on the circumstances.
Polls have their limitations. Here are my answers to your scenarios:
My sister is getting married in a church.
Definitely Yes
*A man walking on the street invites me to join a ceremony
Probably not, I am against prosletysing
*In an attempt to bridge communities there's an inter religious evening.
Definitely yes
*Simply out of curiosity, or to learn
Definitely yes, but with respect
*I'm going in an attempt to preach my own faith
Definitely not, I am against prosletysing
With regard to you other concerns, if there was a certain ritual that I felt uncomfortable with, or knew that according to that faith, unbelievers should not participate in(such as communion in a Lutheran church), I would refrain from participating.
But standing up, sitting down, kneeling, singing (if I knew the words and the tune),even bowing, I personally would have no problem with.
Since I have become a Hindu, my husband (also a Hindu) and I have attended at various Christian churches (funerals, special services), and we have attended Islamic "readings" to which we were invited by a Muslim friend.
My brother, on the other hand, who is a fundamenatalist Christian, would not attend any religious function not of his faith out of general principle, (not even memorial services for our mother that I had arranged at our Hindu temple).
So, you see, I am well acquainted with both extremes.