Well best part of living in Chandigarh is you have best of Punjab, Haryana and HP here. So as for Lassi and Chaas, the milk product making companies of both Haryana and Punjab sell them at there outlets.
When I was in bank we used to go after lunch to drink these. First the slaty one and then finish it up with sweet one. :banana2
Nobody worked after that cos we needed bread pakora and tea to stay awake.