You'd surely get a warm and great welcome even if you just visit for the very first time to the showroom.
I visited a week ago, not keeping any Tata cars in mind to buy. But the way they treated me made me to consider Tata cars.
I've visited the other car makers showrooms in Tirunelveli and felt this is one of the best place in terms of treating the customers. (Note: I had a very worst experience in Aadhi Maruti showroom, which belongs to the leading car seller of India).
In the second visit, they spent almost 2-3 hours with me to explain and demo the cars. The sales people (esp. Mr. Palani) and the manager (Mr.Rajesh) are so kind, very patient and more informative.
I booked my first car Tata Tiago after a week-long research. The warm welcome of this dealer is one of the reasons for this consideration. Keep it up !!!