Service Tax Is Optional In Hotels and Restaurants
"Restaurants billing ‘service charges’ in addition to taxes is optional" - Department of Consumer Affairs, India.

What that means to hard-core foodies ? You get to eat more with the same amount :-).
The Central government, in a press release, has also directed the state governments to “sensitize the companies, hotels and restaurants in the states regarding aforementioned provisions of the Consumer Protection Act, 1986.”