Though the same rule may not apply to all and has some exceptions.Maybe as an analogy it is like alcohol or something.

However industries such as steel, advertising, recreation and alcoholic beverages pay upwards of 40% and they are bought and sold all the time. 

If it's not in the contract, it won't happen.No drugs, smoking, or alcohol on-site in the contract - I've fired contractors in the past due to workers being under the influence.

According to a copy of the bill, the licensing law would allow the county to force landlords to evict any tenant convicted in the past year of felony, misdemeanor or ordinance violations on a variety of crimes, from drug dealing to alcohol consumption to gambling.

And unfortunately we are in San Francisco, so we can't just say we are not going to continue the lease (they are on month to month now)For any new lease, we already add a clause that says, you can't drink alcohols in backyard and I think I can also add clause says , you cannot have guests over in backyard, that would give me some "teeth" in the future right?

I recommend a place that serves alcohol as well.

Examples would include bread, alcohol, beer, and numerous types of wood products.

I know you have had a myriad of disappointments throughout the entirety of this mess for these years, but I am sending good "juju" in the universe for you, and hopefully there is an end in sight for you.As another young lady who has offered to buy you a drink after this; when I am in LA this year, I will buy you one too, or you tell me your favorite restaurant/bar, and I'll make sure you get a drink on me - alcoholic or non-alcoholic; whichever is your preference ;-)

The Zinsser Shellac would be my first option (alcohol based), and I'd use a chip brush to be able to throw it out afterwards.

Just like bringing coffee into a coffee shop or alcohol into a bar.