PYC does have bar at the facility. All alcohol must be purchased from PYC. Drink mixers will be supplied by PYC. Beers are $2 per can, $3 per bottle. Wine is $3 and Shots are $3.
You can run a tab or go with a cash bar.  Additionally, you may purchase a keg;  $170 for domestic brands,  $185 for premium brands, and  $230 for Corona or Modelo.
Kegs are not available for High School graduations.
Best investment you can make towards your bar bill is a magic marker for cups.