I tried to get tickets online to the Sunday evening performance of FANNY well in advance and encountered the same thing, pretty much for every level in the theater. I went to the box-office the day before the performance and walked away with two 7th row orchestra dead-center seats.
I'm sure ANYONE CAN WHISTLE is going to be much more popular than FANNY, but I'd still try the box-office if you can. They are probably holding on to blocks of seats.
Cheyenne Jackson tickled me. AFTER ordering SoMMS a drink but NOT tickling him, and hanging out with Girly in his dressing room (where he DIDN'T tickle her) but BEFORE we got married. To others. And then he tweeted Boobs. He also tweeted he's good friends with some chick on "The Voice" who just happens to be good friends with Tink's ex. And I'm still married. Oh, and this just in: "Pettiness, spite, malice ....Such ugly emotions... So sad." - After Eight, talking about MEEEEEEEE!!! I'm so honored! :-)