In American churches... Do the people there sing often in a gospel style?

I am not the one to ask. It depends on the Church. I assume you seek Gospel? I was raised Methodist. They,
I felt' were on the dry side. And ours would switch pastors who were Baptists on certain times of the year.
You might simply look it up on the Internet to see what style they worship in. The Pentecost comes to mind.
But I cannot be certain.