Hi,
If you are charging for an admission to an event then the place of the supply will be in Ireland and so there would likely be a requirement to register for VAT in Ireland.
However if you are supplying education on an ongoing basis then the service would be subject to the reverse charge by the Irish business and so there would be no requirement to register in Ireland.
Please see section 9.2 and 9.3 of the guidance below which defines the different treatment of these supplies.
Services supplied ‘where performed’
Thank you.