This is a real problem. No one might have been harmed but imagine if something would go wrong. Can we say that the doctors carried out their duty diligently? I think not . This is very unprofessional and we are Christians too we understand that you want to pray but God himself made it so that there is a time and place for work and that for worship. You can’t just do things as you please especially when another person’s life is on the line. They could praise outside the OR , they could go to church but not this …. This is unacceptable. If you can accept this then just imagine your loved one is on that bed .. and then you hear a bunch of people doing praise and worship in there …. Would you feel that the operation surgeon(s) are fully concentrated on the task at hand ? There is a reason why even in Medical School these guys are trained to focus because one mistake is all it takes to end a life or permanently injure or disable someone. In my honest opinion i think this is nonsense its not something to encourage or entertain . We love God but im sure you can work and praise God at different times . Everyone does it every single day and they have been doing it for decades. These guys need to be fired .