If you like live theater, book yourself a seat for a play or other stage show at Rezo Gabriadze Theatre. Check online to see what's still available.
If you've got time to stop for a while in Tbilisi City Centre, Rezo Gabriadze Theatre is an interesting place to start your sightseeing. This arts and culture attraction is one of numerous attractions that'll keep you on the hop here. St. George Statue, Narikala Fortress, and Metekhi Church are also waiting to be explored nearby.