Is there a possibility of Communion between USA churches and European churches?

Hi! I'm asking this question as a European from northern Europe, with an interest in history and religion. In my country we sing Psalms on the occasion of students leaving school, and upon every spring we have a special song sung even. As of today, most people do not believe, in that sense, but I feel many enjoy it as it is tradition. My question is, how ecumenical is the US in these aspects? In my country, most don't bother with religion, but have no trouble in singing some songs when finishing school. I love some of these songs as they are more specifically about nature, is there something similar in the USA? How are the Psalms in the US?