Further to the last point, we received the following information from Councilman New's office earlier this morning:
Denver’s Parks and Recreation Department is trying to simplify and unify regulations for the sale and consumption of alcohol at events in all of their parks. They are piloting a program which starts Jan. 1, 2019 and expires Dec. 31, 2019 before permanent rules go into place for 2020.
The City of Denver has an extensive page of answers to Frequently Asked Questions as well as the latest version of the proposed changes at https://www.denvergov.org/content/denvergov/en/denver-parks-and-recreation/parks/park-rules-public-policy.html