We're getting off topic here, but both Mennonites and Amish wash feet at communion services. Some of the liberal Mennonites have dropped the practice. My congregation had a foot washing service this past April but it's not something we do regularly. The Amish left the Mennonites because the Mennonites were becoming too worldly.
I wasn't raised Mennonite. The first Mennonite congregation I attended was "plain" the women wore cape dresses and head coverings. The men wore what they called plain coats. (No lapels) They did not wear jewelry, not even wedding bands. They used a hymnal with shaped notes. (I had never seen anything like that before.) That was a LONG time ago, when I was in my early 20's and now I'm nearing 50, They had a piano, but if I remember correctly sang a capella frequently. (Even though I did not dress like them, I was always made to feel welcome. They were among the nicest, friendliest people I had ever met in my life.)
My husband and I moved and started attending a church where there was a variety of styles of dress. They most definitely had a piano there. I became good friends with the pianist. I went to a class to learn about shaped note singing, but am musically challenged and just didn't get it. :) There were some issues there, the church split over a preacher... and we felt the need to move on.
Now I'm at a more liberal church, with a full worship team. Yep it's still Mennonite, but it doesn't say that on the sign.
We are trying to make to more open to people in the community. Some how the word Mennonite has so many stereotypes associated with it... :)
There is a horse and buggy Mennonite church a couple of miles from my church. I bet they don't have IM. Sometime maybe I'll have to visit, It would be interesting, but where to park the car?