He's not being polite to background musicians. He's being polite to the potential sex he might get from her (as discussed when he offered to buy her son a present instead of attend his party). So, in this case, he wasn't "wrong" at all. He was being completely loyal to his character (the sex is a much bigger priority…

Oh, and the idea that he has to keep flying further around the world to avoid spending any time with disadvantaged children was priceless. Icing.

Absolutely brilliant episode - the most explosive laughter I've had all season. A+ for me. The whole season was a step up. Best comedy show on TV.