Few if any of the souls that adhere to these "churches" are saved. Being a member of the American Legion doesn't accomplish the salvation of one's soul.
That's a fact, and if it's just a social club, there are plenty of other options that offer better music, food, entertainment, etc. A so-called church with no eternal value is of no value whatsoever.
Revelation 3:20 - Behold, I stand at the door and knock. If anyone hears my voice and opens the door, I will come in to him and eat with him, and he with me
That's not Jesus knocking on the door of our hearts, as many incorrectly teach it. That's Jesus knocking on he door of the Laodicean church - a church like many of these - and there is not a soul inside who is opening the door for Him.
So, there are no Christians in the American Legion who could witness for Christ?