Look at the 4 different ‘s’ and 2 different ‘r’ and ‘u’: my guess is handdrawn.

The Your Party is Our Business font is called Artistik, and it is an old Art Nouveau era typeface, designed by Bauer & Co & H. Berthold, in Stuttgart. & Berlin, respectively (See Petzendorfer’s “Treasury of Art Nouveau Alphabets” from Dover Books)

- Mike Yanega