I'm sure it's do-able, just don't go when there's a full compliment of staff sat around on that sofa. It has a nice big window so you can see. At the end of the day, she's there to turn a profit and doesn't want to see it walk out, but you have to be firm.
That said, these strategies becoming less effective as she occasionally browses here (at least I think this is the website she's referring to).