It would help if you explained what you call “chilled”, what you consider a “decent amount”, and certainly what you consider “open minded”.
I’m from way over the pond in Britain, so I don’t consider myself an expert on American Yeshivos, but there is a place called Eddisons which you might like. They are a mainstream Yeshiva, high learning standard (bochurim come from there to Brisk), but they have a gym downstairs, and from what I understand, they are quite “chilled”.
Hatzlacha Rabba in finding the place that you can integrate into with ease, and only have aliyah in your learning and yiras shamayim!