There is a similar bazaar in Nizamuddin area of Delhi.
In Lucknow too, there were all night bazaars during Ramzan. I never went to one, but have had food ordered and delivered. Mumbai has one too - I saw one when flying into the city, many years ago.
"A love affair with knowledge will never end in heartbreak" - Michael Garrett Marino
As you said in these festival days it may be throughout the night also. The rates in that area are very less when compared to other areas of the city. We go many time there to purchase some items if we require in huge numbers.
Probably here only all the small small shop keepers purchase the items and sell in other parts of the city.
It is a practice not to sleep on the day of Shivaratri. In East Godavari District of Andhra Pradesh there is a village called Mummidivaram. In this village they celebrate Shivaratri very grand. On that day whole night many of them wont sleep. People will be roaming on the roads and many of the shops will be in open condition expecting a good business. The same thing will be repeated on the village Goddess festival. That village is very famous for Shivaratri festival
'Idhuvum Kadandhu Pogum "
Even this challenging situation would ease