Just make appearance
You can go, and just make an appearance, or stay and visit. If you are the only one not doing all the haram, then, what a message it sends to all. We are not to live like them, but we are not to cut ourselves off from them either. Like our prophet (pbuh) said,"we were made tribes and nations so we may know one another."
We cannot isolate ourselves from others, and in the US, you need to send a quiet message. you never know, someone in that group may want to know more....in sha allah you will be ok. The decision is yours.