I always come here when I'm in Tbilisi.
Room 5 has been renovated - it is now cool and neat, but it costs as much as 200 lari (I think it is very expensive).
The rest are cheaper, but already tired.
The steam room is the best of the public baths in Tbilisi. The water temperature is average. The place is generally more decent than the public bathhouse 5 on Avlabar.