I just had another idea...

I have had a lot of contact with the Lance Armstrong foundation. They help people with cancer.

Every single time I have called them or emailed them I have gotten a reply within 24 hours...

Maybe you could call or email LAF and explain the situation to them - they would probably be willing to contact the person planning this party (and/or the chemo patient) to explain the dangers of having this party.

Having someone official from a national foundation call them might be very powerful - and might just help them to change their minds about this party.

To contact the LAF go to www.livestrong.org