Vbouldr - I visited a modern Russian church in Colorado on a regular basis for about a year. I was engaged to marry my Russian husband at the time and wanted to be exposed to as much language as possible.
It took several visits before I became accustomed to the rate of speech. (It's a lot different to learn a language from books, tapes, etc. than to hear it spoken in "real life"!) I did learn a lot of vocabulary for prayer and praise and worship. The Russian Bible they used was in the old Slavonic language, so I didn't catch much, but now my husband has a modern language Russian Bible and it is awesome! The best thing about visiting the church was the relationships I made with the young people and women. They all attended our wedding, and blessed us by making our cake, my wedding dress, singing in Russian during the ceremony, and our ring bearer was a little Russian boy (the flower girl was an American girl!) Awwwww! I can help you learn some modern praise songs in Russian too if you'd like!
Слава Богу!