Noise cancelling headphones? Are those allowed?
You could give it a try for the next happy hour if you feel like it. Check it out and see how it makes you feel. My work place does those on Fridays. I usually don’t go for several reasons. But I go to other gatherings. Pick and choose what suits you. Those things aren’t required and is entirely everyone’s personal choice. And you’ve been there only one week. It’s ok to not partake in events yet