Cover band Terrapin Flyer has a couple events around the DeadCo shows: http://terrapinflyer.net/calendar/#acti ... h_offset=1
June 30th Terrapin Flyer w/Melvin Seals at HVAC Pub
July 1st Terrapin Flyer w/Melvin Seals at Anita Dee Yacht
June 30th | Steve Kimock with Electric Beethoven
Metro - Chicago, IL | Afterparty for Dead & Co, across the street from Wrigley - On Sale tbd
The Cubby Bear is also a great bar right by Wrigley.
As for pizza, I suggest Giordano's or Lou Malnati's.