Established in 1970s, the 'shopping cum office' complex, has shops allotted to refugees who came to Delhi after Partition. Most of the shops belong to tailors who specialize in denims, be it a pair of jeans or a jacket or even a shirt.
Vogue Jeans Tailors and Drapers, Good Fit Jeans Tailors and Drapers and Maqbool Son Tailors and Drapers are some of the shops I would prefer. They have a bunch of tags they stick behind the jeans where the brand tag is supposed to be tags like Levi's, Wrangler, Pepe and many more.
Once you're done with the shopping, make sure you visit the legendary Indian Coffee House.