I have always wanted to hear Mozart in the Opera Granier and was so excited to find that there is a performance there when we are in Paris. It says young audience infront of the title. Has anyone gone to attend one of these performances. How awkward would it be if there are two 30 year olds sitting in the audience.
I don't have a specific answer to your question but I just want to point out that the Pass Jeunes program at Opera Garnier is aimed for those 28 and under as opposed to teens so my guess is that 30-year olds would not feel awkward.
You might be misunderstanding these performances. It is not "just for kids". It is part of a training program for young performers covering all facets of opera production. I don't think you'll be the oldest people in the audience. Read more at https://www.operadeparis.fr/en/academy/about