I don't care if its a pps or mms. But I have had 3 instances of dealing with other males at these places, only one was uncomfortable.
1. A guy who wouldn't leave the front door, just hanging out there, and I was running late. Finally MMS texts me "OK now" after he leaves. As I enter, she texts "wait a minute he is coming down the stairs" but it was too late - we just didn't acknowledge each other. Was fine overall.
2. Same visit, after I'm done I'm in the hall putting my shoes on. MMS is chatting with me when a door opens and a client comes out and just walks down the hall, and leaves. This was very uncomfortable. I don't mind seeing another monger, but this guy had a stern look on his face and was moving with purpose. I just looked at the MMS who smiled, shrugged, and then laughed. I had to do the same...
3. Was waiting for my girl when a door opens and I hear laughter. I don't know why they had left me sitting in the hall, but that's where I was when the monger, in a towel, comes out with his girl and they head into the shower laughing and chatting the whole way - oblivious to me. Not uncomfortable at all, kind've funny but a little odd.
Those are the only times I've ever run into other males. I've had 2 PPS experiences - both fine.