MDMK leader Vaiko and founder of Naaam Thamizhar Katchi Seeman have demanded ban on the film, alleging that it has portrayed the outlawed Liberation Tigers of Tamil Eelam (LTTE) in a bad light.
The film is set in the late 80s and early 1990s, during the time of Sri Lankan civil war and the assassination of then Prime Minister Rajiv Gandhi.
"I would like to urge all of Chennai to support 'Madras Cafe' as a film and allow it to release (as per the schedule). It is a credible film made with a lot of heart and gives audiences something novel to be entertained about, vouching and encouraging cinema," John said in a statement here.
Directed by Shoojit Sircar, the political espionage thriller, also starring Nargis Fakhri, is slated to release on August 23.
'Look' how the Sheena Bora case has taken a toll on Indrani Mukerjea
Photos: Katrina Kaif, Parineeti Chopra, Shilpa Shetty's movie outing in Juhu
Birthday special: 14 Bollywood actors who made it big on TV
Photos: Vaani Kapoor, Poonam Pandey, Sana Khan at fashion event
Photos: Rishi Kapoor, wife Neetu, daughter Riddhima at book launch