The Old Srilekha Intercontinental, later renovated and relaunched by Marriott as Courtyard hotels. Its on the Anna Salai aka Mount Road, the artery of Chennai. They have a superb service, lively coffee shop called Paprika & well doneup bar called Rhapsody.
Their Sunday brunches used to be popular, not sure if its still on. Also to mention their ever smiling security guard who frisks the guests at the entrance.