Sudama isn't around CP. However a really good chai wala sits just outaide bangla sahib and also serves the most tempting pakoras and samosas.
The one outside Bangla Sahib Gurudwara. I’ve heard they even serve coffee starting at Rs 5!
Sudama Tea Stall, it isn't around Central Delhi but definitely a good one though.
Chai point. 4/5 star rating by Zomato