Answer: The correct phrase is "Open Mic"
is the shortened form of microphone
refering to the electric sound wand on stage that is openly available for use by anyone who turns up at such an event.
— on the other hand — is an informal handle used when refering to someone named Michael. If the phrase was
"Open Mike" it would
mean "A man named Micheal who is openly available for use by anyone"
. If you are
looking for that kind of thing and have arrived here by accident,
may I suggest searching Facebook for people named Michael
, but please
keep the results of that little experiment to yourself.
The variation of the phrase "open mike" is often used by Americans. They are wrong.