The food here is excellent. During busy hours, it can be very chaotic. I recommend going there on weekdays out of the busy dining time.
They have a variety of Briyani, and the portion is enormous. So we always order small size. I love their Fish curry. The taste is excellent.

If your in the town area of Singapore and craving good authentic food..Good Indian food... Has good variety.. Halal meat available.. So is chicken, Mutton, beef and Deer.
The deer biryani is available !! A bit expensive though.
The upper setting area is air-conditioned and pretty spacious..
Upper area not wheel chair accessible... Good tea..Teh available..

Long standing Roti, curry and more restaurant. Get the taste for authenticity in S’pore. Didn’t expect for the service so no disappointment gotten.
Very tasty with Fish Briyani and also Sardines Murtabak too. Each dish came with a portion of curry to go with and they both compliment each other.
Deer meat curry came in large portion but not tender enough.
Nice milk tea and coffee.
Air conditioning room on upstairs.
Enjoy~.

IF YOU ARE A TOURIST DO NOT COME HERE!!!!!
Went to zamzam for the first time and was terribly disappointed. The mutton briyani rice($9) was so so bland and tasteless. The murtabak deer($12) meat was so little. Literally onion more thn meat. Packed kuehtiow goreng($6) and again it was bland! Ordered teh ice and it is sooooooo weird. Nil tea taste only color and the worst part it is $2.80 per cup. Asked for ice water and it 50cent per cup. Ridiculously pricing. Do not come here as a tourist. It is overly exaggerated and overhyped. The paying counter staff is so rude and shouting all over the shop. Unpleasant experience.

One of the best place for biryani you can find in Singapore. A must have for travellers to savour the traditional Indian Muslim food