East: It's probably not as bad as you think it looks. Toppik is good advice, toupee, etc.
Btw, I doubt anyone will react the way you're worrying about. If someone does react like a child, the other people at the meeting will think he/she is an a**.
Also, what's wrong with telling your client what you did? Most people would find it very interesting. Those that don't - well - maybe we could call them IDIOTS!