Do not take those clients man.
Tell them u are busy.
I got robbed the other day at gun point in my studio (thank God they only wanted money).
They called in to book a rehearsal room, they went in the rehearsal room and when they came out, they were armed. Everything went wrong for them, one of them got caught, 8 years in prison.
Less than a week and a half later, somebody broke in the studio from the kitchen window. Again, money. They took 30 bucks from the cash box. Ridiculous.
Take precautions. Install any alarm system if you dont have it, place cameras with a recording hard drive and always look around when coming in/out of the place. If you have any windows, install iron bars. We did.
Things here in Panama are nuts. Today somebody tried to break in where the mastering engineer lives and fortunately one of his room mates was in the apartment at the time and got to scare the guy off somehow.
Be careful man. Thieves have no conscience. They will do anything to get their plan across.