I don't think this is true. My startup had a couple desks in the Palace of Fine Arts when they had an ill-fated attempt to convert part of it to a co-working space. They shut down co-working to turn it into a full-time event space. The building is basically one giant room, with a raised mezzanine floating above part of the floor. It has one small permanent theater on the north end, and they convert the southern end into a larger theater for music shows, and this is the seating chart being shown in the above link (I saw a Ninja Sex Party show there one time, but this theater isn't reflected on the tour photos. When I was working there in 2016 it was an exhibit for Hunger Games).

https://palaceoffinearts.com/tour/

>> The Palace of Fine Arts is a theater, not an exhibit hall. It's a completely unsuitable location for a conference.

This is not the case -- The Palace of Fine Arts is an excellent conference location - expansive and with mezz levels for private presentations, etc. I've done several conferences there and also presented.

It has beautiful outdoor garden spaces for relaxed 1:1s and doesnt feel at all like SF as most people imagine.

Conference, yes. Sales pitch and/or hype presentation, no.

It may be real?

Edit: down below it says this theater will Host a conference of 30k people. No it won't. This is a scam.