Yes, they might, but in 30+ years of travel, I've never seen it...and I've brought a LOT of un-registered guests into a LOT of lounges. Act like you're supposed to be there, don't ask stupid questions like 'can I bring my friend who isn't staying in my room in?' and you're probably fine. The most stringent scrutiny I've ever been given is 'what's your room # Sir?', which they then check against a list to see if that room is eligible for breakfast, lounge access, whatever and we move on from there...easy peasy!

Did anyone actually look at the actual terms around this? It doesn't at all specify that the 'additional guest' has to be staying in the same room:

Please Note: One (1) additional Guest is allowed. There will be an additional charge for additional Guests (prices vary per Hotel).

https://help.marriott.com/s/article/Article-23374

I have absolutely been asked in Japan and Hong Kong. And I could absolutely see this happening in other Asian countries, in Germany, and some places in latin america (e.g., Colombia).

Asked for what? Your room card? Your ID? As you can see in the rules it doesn't specify that the 'guest' needs to be registered in your room, or even in the hotel, so I don't get what the big deal is about here.

Some lounges in Asia locations do verify guest names and in some occasions do ask for IDs. Yes, that happened in Hong Kong, Macau and Japan. I believe it is a common practice inside China. Haven't encountered such practice in European locations.

It'll be fine. Not a problem in Munich or frankly, anywhere if you have 2 guests booked per room. Get 2 room keys at check-in and you should be all set

I've even guested someone for breakfast at a hotel in Asia that didn't have a lounge. I met a nice lady at Happy Hour in the bar who was also traveling alone (but no status), so I invited her to join me for breakfast. And if you saw the welcome spread I got at the Sira this week, there was definitely enough there for 2 people! :)

Must be something happened in the last 5 years as I have been to a bunch of hotels in China HK and Macau and we were never asked for any id.

It doesn't make sense though because often you can check in at the lounge so they recognize you from day one. I know they have a lot of guests but still they have a copy of your id at check in so there's no reason for them to check your id again. Unless they have a lot of imposters trying to use the lounge for free.

it really does depend on the property. across europe id say 98% of my stays have lounges that do not have a staff person checking people at the door. the sheraton in warsaw had a dragon staffing the desk and had denied many people who tried to bring a guest not on her little piece of paper--hadnt seen anything like that before lol. but even the prague marriott with their incredible lounge list how much lounge access is for an extra guest, but despite this they did not have anyone at the door actually checking things. so it really is just luck of the draw, but rare.

I just inquired the lounge at Sheraton Imperial Kuala Lumpur by email, as we're going there in March. They sent a pdf describing that an elite member can have access to the lounge. It then indicated additional guests in additional elite guest will be subject to a fee. I wasn't sure if they mean I'm the Elite member guest, or I can bring an Elite member guest and additional guests will be charged.

I emailed again to check if I can bring a guest, my wife who is staying with me, or will she be charged. They replied that I can bring my wife. But that description at first wasn't clear.
https://cimg2.ibsrv.net/gimg/www.fly...f88c8962e9.png

Basically they are try to say E+1.