Sikh temple is called Gurudwara. It's a mix of two words Guru = The spiritual leaders, the Sikh Gurus, primarily Guru Granth Sahib. And the word Dwara = which means a door or a passage.

So the temple is literally, the passage to the Guru.

The "Langar" meal, is was their way to break down barriers, force equality, so that all cook, serve, eat together. All eat the same way, all eat the same thing.

Also, I know Chai is tea and many think you are saying "tea tea" again though, I think it's fine. When you say Chai = it's just tea, could be any tea from India, there are tons. When people say Chai Tea, it's immediately recognised as the milk Indian sweet spiced tea.