The Government said it planned to make vaccine passports compulsory in some settings such as nightclubs and crowded events from the autumn.
However, some venues have already started to request revellers to show their NHS Covid pass for entry.
The O2 Ritz in Manchester and Electric Ballroom in Camden will both require guests to show a valid NHS Covid pass to the Ultimate Power club night on Friday evening.
To get inside the venue, clubbers must have had a negative Covid test, have existing antibodies or be fully vaccinated, with two doses of a jab.
"For our initial London and Manchester events, we are requesting Covid Passes at point of entry to our clubs," the organisers said on the event’s website.
Other venues under the O2 chain and run by Academy Music Group, which has more than a dozen venues across England, will tell guests that anybody attending their venues will also have to show a Covid pass.
They said: "Whilst Covid-status certification might not be mandated by law right now, the latest government guidance states that venues such as ours - where people are likely to be in close proximity to others outside their household - are encouraged to use the NHS Covid pass to certify Covid status for all visitors."
It comes after the NHS app was updated to allow it to be used as a vaccine passport in the UK as well as overseas.
The wording on the app has been amended to now include a “domestic” section.
It states: “You may need to show your NHS Covid Pass at places that have chosen to use the service”.
Previously, users were given the choice of using the app to show proof of their vaccination status for foreign travel or for the Government’s events research programme, such as getting into Wembley for the Euro 2020 matches, but the latter has been deleted after they ended.
Businesses can now use the “vaccine passports” on a voluntary basis to ensure people entering their premises have been double-jabbed.