Well, that went better than expected. (Correction: It went as I had hoped
)
Just called the lady in question, and told her the restaurant I picked was now part of a chain of restaurants, to which $Restaurant1 in her own town also belongs.
"Yeeaaaah.... I know that one. *laughs* Well.... *giggles* Ahem..."
When I told her that wearing format attire, showing up in a huge expensive car and behaving like royalty would essentially be necessary to not look out of whack, she laughed some more and agreed it would be a good idea to look for something else. I did catch her out of the house though, so I'll be calling back later.