The Themed Entertainment Association (TEA) now boasts 600 members, with Europeans making up around 100 of the membership.
TEA president Nick Farmer, who will step down later this month, said the figures demonstrate that the association was growing in stature on both sides of the Atlantic.
“We are now organizing some really excellent behind-the-scenes events {in Europe}. We had one in the Historic Dockyard in Portsmouth, UK last year and one in Paris at Euro Disney this year, both of them tremendous successes. We’ll meet again next year in Barcelona."