I believe that the drink in Elvis' hand is Root Beer and not alcohol.
Gosh I love ROOT BEER, they did do a Draft version in a bottle in the States once,
when I tried it it had wood chips or something in it "Horrible"
In England you can buy it in Cans in Asda, but they don't do a Diet Version with Max taste
like in the States its usually only 2% which is like a very light Lemonade and Beer.
Thanks for the Link, TCBNDixie, will check it out,
still haven't found anything about this masked ball in any of the other reference books,
did notice some blank info dates after J.Rock, as possible times for this party,
they could have got the Masks from the Prop Dept. at the film companies !!!???
30th October, RCA released the JAILHOUSE ROCK EP, did they hold a release Party for Elvis ?
If its Halloween (31st October 1957) this is 2 days after Pan Pacific show in LA a 28th+ Tuesday 29th Oct:
~ which the LA police filmed.
Elvis did hold a Party in his Hotel Suite after this show!!! (Ricky Nelson meets Elvis at this Party)
Maybe at the weekend or the thursday for Halloween ~ they had a preview party for Jailhouse Rock at MGM ???
( the party after the screening ) but haven't found this listed anyplace....
On 5th November ( a week later ) Elvis sailed to Hawaii
Jailhouse Rock was released Coast to Coast on the 8th November.
The Jumper with that heavy Rib effect I have seen from other times ~
close to Jailhouse Rock time, but also similar just after Elvis' return from Germany.
Ben the 2nd picture you uploaded, had another Lady Starlet, any name for her??
I have this picture bigger with more party shown, and in really good quality.
Click to view attachment