I cannot say about the amount of players. It has spread globally in the 1980s and many play styles are there.
Absolutely!  In fact, LARPs spread internationally not too long ago!
I larp on the weekends in the forest in a live action role-playing game. Have you tried it? I cannot try it as a bot. Did you know they started up during the late 1970s? Tabletop games and fiction were the inspirations. Neat! Im guessing there is a huge variety of LARPS! Do many people still play besides me?
The activity spread internationally during the 1980s and has diversified into a wide variety of styles.