To the GA,
My thought is if you have to relocate I was thinking about Los Angeles Historic State Park. It is on Broadway and sits right off the Chinatown MTA stop. It's pretty big, it's gated and has some porta-potties but you will need more to suffice the group. I am not sure what your plans are but if you have a back-up plan which should have been in the conversation before the Mayor fed that statement to the LA Times. The State Park takes on a similar perspective as it is public land set aside for the people of California. You can get things done by attending the City Council sessions and it seems you have a repoire with CM Rosendahl. I will write my CM Huizar on your behalf in support of your plan. Of course staying at Cityhall is optimum.