Learn Dutch: Ik zing niet meer in het koor. - I do not sing in the choir anymore.

We use niet meer because we are negating the action of singing (zing). You use geen ... meer when negating a noun that has no definite article. For example, if you wanted to say 'I do not sing songs anymore,' it would be Ik zing geen liedjes meer.

Can I put niet meer at the very end of the sentence, like 'anymore' in English?

No, in Dutch, niet meer usually comes before prepositional phrases that describe a place or time. Putting it at the very end (Ik zing in het koor niet meer) sounds unnatural. The standard order is verb + niet meer + prepositional phrase (in het koor).

Are niet and meer always kept right next to each other?

Yes, niet meer almost always stays together as a single block meaning 'not anymore' or 'no longer'. This is different from geen ... meer, which gets split up by the noun you are negating, like in Ik heb geen tijd meer (I have no time anymore).

What is the gender of the word koor?

It is a neuter noun, which is why we say het koor. It translates to 'choir' or 'chorus' and is pronounced very similarly to the English word 'core'.