If you are American ($) or European (€), then you are in luck. First, the exchange rate is very good today (January 2017). Second, you can get either dollars or euros from ATMs. Why would you want to do this?
When you get Georgian laris from the ATM, you get the bank exchange rate, and your home bank charges you up to 3% in “foreign transaction fees.” So, get dollars or euros from the ATM, then exchange your dollars or euros at one of the many currency exchange vendors who do this. They are very visible on the street, always with big neon, red exchange rate signs showing you the buying and selling price for various currencies.