No proof of vaccination required.
If you are attending Houston Ballet you are only required to wear a mask while attending performances.
Only masks were required when we attended the Houston Grand Opera yesterday at the Wortham Theater.
I went to Jonas Kauffman's concert and for general admission there was not proof required. Only the VIP MEET AND GREET Were required to show proof for that event. Hope it helps.
Thanks! Your answer is awaiting moderation.