I don't see where it state in the Constitution there is a specific place the SOTU is held. It wasn't till modern times and TV that it was held in the House because it is the larger of the 2 chambers.
He could hold it in a huge Aircraft hanger at Camp David for all that it matters, and seat them on folding chairs. With the Vindictive Botox at the back the furthermost from the bathroom with a camera in her face so we can see all the faces she makes as she has to face all those Angel Moms/Dads and relatives. This President has a Spine and fights dirty when he needs to, that is why we chose him.
Article II Section 3
He shall from time to time give to the Congress information of the state of the union, and recommend to their consideration such measures as he shall judge necessary and expedient; he may, on extraordinary occasions, convene both Houses, or either of them, and in case of disagreement between them, with respect to the time of adjournment, he may adjourn them to such time as he shall think proper; he shall receive ambassadors and other public ministers; he shall take care that the laws be faithfully executed, and shall commission all the officers of the United States.
From that 1 statement "he may adjourn them to such time as he shall think proper" he can choose the spot and adjourn congress if I read it right.
Aren't there huge banquet rooms in the WH? Rose Garden, or Trump Tower?
I think it would be hilarious if Trump adjourned both houses of Congress indefinitely. If McConnell decided to go along with Trump, then it would appear that the Senate could adjourn and then the House would have to adjourn or Trump could force it to adjourn.
The fly in the ointment might be whether or not McConnell has the power to adjourn the Senate or is it subject to filibuster. Even if subject to filibuster, McConnell could perhaps use a "nuclear option" to eliminate the 60 vote requirement.