Christianity has many thoughts about religion, and they are codified as Catholicism (Catholic) or many Protestant faiths; (Baptist, Methodist, Lutheranism, Reform, Pentecostalism, etc...)
A non denominational is someone who refrains from taking sides in the above complicated mix. Instead they focus on the things that are universal and apply to all.
I have a friend from Turkey who thinks a Whirling Dervish is similar to a Non Denominational, but it doesn't seem to fit based on my understanding so far.
Can anyone describe what's most compatible with a Christian "non-denomiational" in Islam and what does, and does not, carry over between faith perspectives?