Yes, you can use public transport to get to the event venue.
The easiest way is to get off the train in Haarlem and catch a bus to Bloemendaal aan Zee (bus stop “Overveen, Strand”). From there you have a 5 min walk. You could also get a train to Zandvoort and bus to Bloemendaal (same bus stop). Keep in mind that last trains are around midnight from Zandvoort to Amsterdam.
For transport schedules and planning please check: <<9292>> (also available as a “9292” mobile app)