yes it is, but certain activity such as kerb crawling or running the brothel is illegal. but where there is a demand there is a trade. Some policemen may be bribed to turn a blind eye, but best not be caught as you will endure a hardship. Be discreet and you will make a good earnings in certain circles. But look at the ‘devadasi belt’. Not all prostitution will lead to riches, but it's a means..