What are expat neighborhoods in Mumbai?

Hi!

I'm looking for information on neighborhoods where expats mostly locate to. Furthermore, I'm also looking for realiable real estate agencies. If you have information regarding these two topics and willing to share it, please let me know :)

Before I forget, does anyone of you know where I can find all the holidays specifically for Mumbai?

Thank you so much and have a nice day.

Cheers, Annemieke (the Netherlands)