Starting on the night of Mahasivaratri (February 13 this year - 2018), many temples dedicated to Lord Shiva will host dance festivals called Natyanjali where dancers perform to the Lord inside temples.
The fests are spread across one evening or a few evenings. The most famous of these Natyanjali festivals are held in Chidambaram and in Thanjavur - inside temples. They are open to all and admission is free.
Free and open to all.