 Other non-themed bars started placing tiki drinks on their menus, signalling a broader acceptance of the genre while also engendering discussion over what qualified to be called an "authentic" tiki bar.Interest in Tiki had also proliferated overseas, with "The Book of Tiki's" Sven Kirsten hailing from Germany and where a tiki subculture is strong.In 2017 noted Tiki historians Sven Kirsten, Jeff Berry, Martin Cate, Jeff Berry, Brian Miller, and Chris Osburn listed their top 15 operating Tiki bars in the world, which included four from London, one from Munich, one from Tokyo, and one from Barcelona.