From Wikipedia, the free encyclopedia. A Rupees would go a long way with Champa Das. This is the story of Munni, a commercial sex worker from Sonagachi, the largest red-light district in Kolkata, India. When they contacted customers, they asked them " Khat-e na Chot-e "? This will not include food and travel expenses. We are not Sex centre in kolkata to go to the camps.