Most Malaysian especially those who are not muslim or not Islam believers, never enter a mosque before.
If you are non-muslim. Before you visit any mosque or surau, please read the following : (some are in in Malay language)
- An interesting article from http://jilfityan.blogspot.com/2010/08/muslim-pencemar-islam-saiful-islam.html
The conclusion is, make sure you get the government ministers (from the ruling parties of Be-eNd) written support before you enter any mosque in Malaysia. There are many standards practised in Malaysia mosque. They treat everyone differently. If you are lucky, you may visit a mosque with a welcome ceremony with red carpet.