My Regards . . .

It was a Broadway-themed party.   The guests were invited to attend in costume.
Notice Erik (a.k.a. The Phantom Of The Opera) in the bottom left of the picture.
To his right is Thing 1 (or Thing 2— I have trouble recognizing the difference).

Here are the players' alter egos (L to R):
1. Curly from
"Oklahoma"
3. Jack from
"Newsies"
5. Wendy from
"Peter Pan"
7. Esmeralda from
"Lady Pirates
Of The Caribbean"
2. Terpsichore from
"Xanadu"
4. Elphaba from
"Wicked"
6. David from
"Newsies"
8. The Wizard from
"Wicked"