Here are some of the lovely happy people I saw outside the San Jose McEnery Convention Center today. My son was right: people in costume like having their photo taken.
“Legalize gay solar marijuana!”
Silicon Valley Comic Con 2016
Snowbird of Paradise 
Looks like lots of fun!
Everyone I saw seemed to be having a good time. The downtown streets were packed with participants and people like me who came just to see the costumes.
I had never heard of Comic Con until I heard it mentioned on the TV program, Big Bang Theory.
The comic conventions are an intriguing phenomenon They seem to have grown out of this generation’s fondness for not only comics but also technology, superheroes, computer programming, and sewing. Most of these costumes are hand made by the participants, who are often also “geeks”.