Having some experience in this area I have fought both men and women with as few as one spectator to an audience of 10 usually the sponsor tells the spectators no interference, and no lewd comments of any kind, reaction to a move they see on the mat is ok but other than that keep quiet, the girls or guys doing this are doing this for your entertainment and agreed to let you watch treat them with the respect they deserve they didn't have to agree to spectators. I have an IRL against a guy in a few weeks and a friend of mine wants to be there to watch, so I contacted my opponent he agreed to let her watch and it was me that asked her to basically be invisible I told her it's ok to react to a move you see on the mats but other than that please keep quiet to which she quickly agreed, all this should be worked out when the match is set up to avoid surprises during the match. Nothing will take the wind out of a fighters sails than a rude dumb comment during the match. Just my opinion from experience.