TBILISI, Georgia CNN  —  If a space alien landed on Rustaveli Avenue, the elegant main street of the Georgian capital Tbilisi, they might think it’s a party. Crowds of people surge down the street, traffic blocked by police, many wearing the red and white Georgian flag, or the European Union’s blue flag with a circle of 12 twelve golden stars, like capes. Every few minutes another group marches by, clutching banners and flags, beating drums, blowing whistles and chanting slogans. There are the “