Contact the cast
There are several postal addresses available that may reach the Friends..
"Name of Friend"
c/o Warner Bros. Television
4000 Warner Blvd
Burbank, CA 91522
Bright/Kauffman/Crane Prods
300 S. Television Plaza
Building 136, Suite 226
Burbank, CA 91505
Jennifer Aniston
5750 Wilshire Blvd #580
Los Angeles
CA 90036
USA
Courteney Cox
606 Alta Ave
Santa Monica
CA 90402
USA
Lisa Kudrow
10850 Wilshire Blvd #400
Los Angeles
CA 90024
USA
Matt LeBlanc
11766 Wilshire Blvd #1470
Los Angeles
CA 90025
USA
Matthew Perry
7204 Chelan Way #505
Los Angeles
CA 90068
USA
David Schwimmer
1330 Londonderry Pl.
Los Angeles
CA 90069
USA
Unfortunately I DO NOT know of any email addresses for the cast. These are presumably kept for private use only.