Alpha Class..who were these guys again?

Who the heck are these guys? I was in Alpha class and some of them don't look familiar. I see a 10 year old Lenardson to the far left, Jim Jumpe next to him (Jim was kind enough to send in these pics all the way from the Bay Area), Then there is Jeff Cooper but not sure who Chachi is in front of him or who the guy next to him. On the far right is Greg Fishman. And in this other pic not sure who the guy with the moustache is, must be some pledge from the 909. I think he is at the Nugget during tell a dirty joke hour (conceived by Dewey). For more of these poorly lit and incredibly old pictures check out this site:
http://adobe.kodakgallery.com/ShareLandingSignin.jsp?Uc=15wt1ofv.4eer5kv3&Uy=mcisil&Upost_signin=Slideshow.jsp%3Fmode%3Dfromshare&Ux=0