The study cost £60,000.
Night Time Industries Association warns: "People are not going to allow the government to curtail their celebrations."
That it took so long for pubs to be closed speaks to government fear of a powerful public backlash, writes Jodie Hare.
The Marston's pub group owns 18 Pitcher and Piano bars across the UK.
The figures were published a day after Matt Hancock defended the 10pm curfew which Tory MPs warned was killing pubs.
The government's 10pm kick-out has just resulted in some people drinking faster, while elsewhere pubs are struggling to survive and could go bust.
It comes after reports MP's drinking establishments were classed as "workplace canteens".
A scientist advising the government also said he had "never heard" the measure discussed at Sage meetings.
The Brexit Party leader shared a picture of himself with a pint on Saturday, raising concerns that he had broken self-isolation rules after returning from the US.
After more than three months in lockdown, England is reopening pubs, restaurants and other facilities for the public to enjoy. Here’s what you can do from 4th July.