I just said I went to my own sisters quinceñera. It's basically like a wedding where you sit in a table or at a head table. You eat coursed out food etc and yes you talk and you dance. The first thing in the beginning is the priest and announcement which literally no one is talking to you because it's like being in church. I know people act and are different. Also, my sister is autistic and yes she had some problems but my parents went through it a lot of times before it to prepare. You are not required to be on with people as a guests. The spotlight is on her the entire time or the mariachi band or the traditional stuff that is just her and parents. He couldn't take them off for a pic when no one was talking to him since that's what his problem is????