Hi art! Welcome to TAW!
First of all, we should all be honest and admit that no church restricts their worship to things that can be found in the Bible. I bet your church has Sunday School, right? Probably a piano, an altar call, a coffee maker, all sorts of stuff that is nowhere to be found in the Bible. How do you know they are Christian traditions? Furthermore, how do you know the Bible is a Christian tradition? It doesn't say "Bible" anywhere in the Bible.
Don't get me wrong. We love the Bible. In fact, I even kissed a big gold-covered one at church this morning
We believe everything in it is right. But, that doesn't mean that everything that's not in it is wrong. The Bible wasn't intended to be the be-all and end-all of Christianity. There was never a meeting where the Evangelists sat down with Paul, Peter and James and said "OK guys, we're gonna write the New Testament. Make sure you put in everything a person needs to know to live the perfect Christian life, because after John dies God will never speak to humanity again."
That's my problem with Bible-alone theology: it treats Christianity as a dead religion and puts so much distance between us and God. I'm much more comfortable with the idea that God is still talking to us, rather than thinking that He gave us a cryptic instruction manual 2000 years ago and left us all alone to figure it out.
We also recognize that there was a Church hundreds of years before there was a Bible. The Church compiled the Bible, so if you think about it the Bible itself is Holy Tradition.
Finally, (sorry, I tend to ramble) it should be noted that our idea of Tradition isn't so much oral. We have
lots of books of writings, many of which predate the Bible, that our Tradition comes from. So, there's really no chance of things getting distorted as time goes by, since we are so fond of writing stuff down.
P.S. (I was kidding when I said "finally" up there.) We are "Eastern Orthodox" because we are historically and culturally rooted in the East: Moscow, Constantinople, Greece, the Middle East, etc. The other side of the Great Schism, which is now the Roman Catholic Church, and all the churches that broke from it, which are generally called Protestant, constitute the "West." So, there's really no Western Orthodox faith. There are "western rite" Orthodox churches in America that are intentionally set up to feel more like a high-church Protestant church whlie retaining Orthodox theology, but they are very few and far between, and they are still "Eastern Orthodox" anyway. They are only superficially different (their priests wear Anglican-style vestments and they sing more western-sounding music) to make American converts feel more at home.