Celebrate your weekend. | Photo by ronnie44052 via Flickr Not everyone is going to Coachella this weekend. For those who choose to stay put in Los Angeles, the city is literally filled with events this weekend: AltBuild Expo at SaMo Civic Auditorium: an eco-friendy building & design expo LA Times Festival of Books at UCLA: a must see & do Fiesta Broadway at Downtown: party!......