As you said going to attend a seminar at IIT Chennai and for the same you will stay there 1-2 days , so on your demand here I am telling name of Hotels close to IIT Chennai

Vijayamcy Service Apartments, Porur
91 44 30046762
No. 9/36, Pushpa Nagar, Iyyappanthangal, Porur, Chennai – 600116

Hotel Amirta Inn, Arumbakkam
91 44 33054903
No. 18, Jawaharlal Nehru Salai, Arumbakkam, Chennai – 600106

Zama Lodge, Teynampet
91 44 30046231
No. 331 & 333, Old No. 245 & 246, Anna Salai, Teynampet, Chennai – 600006

Hotel Anushka, Arumbakkam
91 44 33055069
No. 17, Jai Nagar, 1st Main Road, Arumbakkam, Chennai – 600106

Sarmani Hotels Pvt. Ltd., Mount Road
91 44 30047966
No. 38/106, General Patters Road, Mount Road, Chennai – 600002

Orange Inn, Manapakkam
91 44 33681917
No. 3/231, Parthasarathi Nagar, Balaraman Garden Salai, Manapakkam, Chennai – 600116

Sea Queen Residency, Royapettah
91 44 30046230
No. 17/39, Whites Road, Royapettah, Chennai – 600014

Silver Gate, Periamet
91 44 33855388
No. 3, Patnool Sandusha Street, Periamet, Chennai - 600003