The Importance of Proofreading?

I got an email coupon last week for a spa. This was included in the description of their treatments:
"Each personalized facial starts with skin analysis followed by cleansing, toning, steam, and extractions using non-abrasive, seaweed-based products and applied by bolero-playing guitarists."

Yes, that is what it said. Now having had a grand total of one facial in my life, I'm certainly no expert. But I just don't know how this works. The way I see it, there are three options:

1. It's an error in word choice. The treatment is actually applied by a professional while bolero-playing guitarists provide ambient music in the background. (Though I for one find bolero music one of the least relaxing forms of music, so that would not work for me.)
2. It's not a mistake, and there is actually a subset of the population previously unkown to me that has the required skills and training to be both a facialist and a bolero-playing guitarist, and can do both simultaneously.
3. They are able to offer a coupon because they pulled in some random bolero-players from the street to shrink your pores.

I honestly don't know which option I prefer but the coupon is sold out so I guess I'll never be able to find out.

(I realize I used the word bolero a lot, but I like it, it rolls off the tongue nicely.)