Fans started lining up early last Friday evening for the 5:30 p.m. start of Chelsea Clinton’s appearance at Left Bank Books. By 6 p.m. the line stretched south on Euclid to the alley between Hortense and Pershing Places. At 8:30 p.m. there was still a line 3 & 4 deep past jeni’s and east+west. Left Bank Books’ events…