The UK Health Security Agency (UKHSA) said 20 meningitis cases were confirmed, with no increase to that number in more than a week.
Vaccines against the strain and preventative antibiotics were later offered to anyone who had attended the venue from 5 March among other eligible groups, including some university students and school pupils.
The risk to the wider population “remains low”, UKHSA said, as transmission “requires close and prolonged contact to spread” and the bacteria was “not as contagious as other infections such as measles and Covid-19”.
Club Chemistry said: “While transmission between individuals could happen at any venue, it is not caused by the venue itself.”