CIM is not common, Monica is the only one who has done it with me. I assume there will be others as YMMV
I've never seen anyone being given a full facial. I wouldn't be happy to see it done in a crowded situation as I don't want any splash or misdirected cum.
I've never done a party. They sound interesting and probably good value. But I do have a few misgivings about them (including doubts about being able to perform in such a public setting). One concern would be hygiene issues regarding, for want of a better term, cum splash.
I've seen plenty of mentions of OWO in previous reviews. I assumed the logical result of that would be CIM, CIF or COB. If CIM and Facials are so rare, that suggests OWO is basically just fluffing and only rarely continues to completion? How the fuck does that work in a real life situation? No way every guy is so controlled they are stopping before the brink, then waiting to don a dom. Tissues or cum buckets at the ready?! Sounds like that would negate the assumption of value.