First of all, the word "churches" is the Greek word "ekklesia" which means an assembly of any sort. Acts contains a record where an unruly mob was called an ekklesia.Revelation has nothing to do with the church? How wrong can you be?
Revelation 1:3-6, "From John, to the seven churches that are in the province of Asia: Grace and peace to you from “he who is,” and who was, and who is still to come, and from the seven spirits who are before his throne, and from Jesus Christ—the faithful witness, the firstborn from among the dead, the ruler over the kings of the earth. To the one who loves us and has set us free from our sins at the cost of his own blood and has appointed us as a kingdom, as priests serving his God and Father—to him be the glory and the power for ever and ever! Amen."
Revelation 1:10-11, " I was in the Spirit on the Lord’s Day when I heard behind me a loud voice like a trumpet, saying: “Write in a book what you see and send it to the seven churches—to Ephesus, Smyrna, Pergamum, Thyatira, Sardis, Philadelphia, and Laodicea.”
Revelation 2 and 3 -- both chapters -- are addressed to the seven churches.
What you're telling us is completely wrong!
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Finally this has nothing to do with the OP: "speaking in tongues is not a gift"
Secondly, read the letters to the 7 assemblies and you may notice many things God said to Israel in the past, but the language is quite different than that of Paul's epistles.
Also you may want to research to see if all of those assemblies even existed when John wrote.
Or just stick with tradition.