Read other letters about this article
This letter has to be a gag. Nobody is so unaware that in this situation they would think the solution to the much adored problem is a new wardrobe for his wife.
The person who mentioned how inappropriate it would be if he accepted a drink from 2 women was right on the money, and you could run with that to show how humiliating (or probably titillating for this guy) it would be if the wife accepted drinks from 2 men and thought they should sit together.
But, why am I acting as if this were a real letter? It's so similar to the article from The Onion, "Why Do All These Homosexuals Keep Sucking My C..."
http://www.theonion.com/content/node/33540