Loaning our Building

Concerning playing a CD or DVD or MP3 etc with instrumental music as apparently happened during the recent Ladies get together in our building:

 

While I do not advocate the use of instruments during our assemblies it is not because I believe it to be wrong but because I cannot find it in the New Testament. I am convinced introducing anything not found in the Bible especially if it causes a division is wrong and just might be the greatest wrong.

 

I understood someone from our congregation was going to be present during the activities. For future reference should they be authorized to stop unwanted behavior? Should the requesting congregation be told we will stop any activity we consider sinful? Is someone going to add to the rules on the Building Use form? Will those Ladies be permitted to use if they submit a request? It will happen again.

 

If they are not permitted to play an instrumental DVD or CD along with their singing because the activity is considered worship and one of our men is present can those women make announcements or lead prayers? Or do we take the position many take that allowing a congregation to use our building does not suggest we agree with everything they will be doing?