Thanks a bunch tashidelek2002 and archana,
I was thinking whether I can really go and ask in the restaurants or the bakery,...but now that both of you gals suggest that, I think...will go and do it.In the mean time, archana, I have bought only dry yeast from Nilgris and not fresh one.Didn't know it ever existed.I shall try that first before approaching the eateries or the bakery thing!

Thanks again.