a minority interest = A significant but non-controlling ownership of less than 50% of a company's voting shares by either an investor or another company. - from ‘Investopedia’.

建议翻译为：

少数股权公司

供参考。



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Note added at 2 hrs (2014-02-05 11:48:50 GMT)
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基于更多原文信息及上面讨论区的结论，minority interest 应该是 minority participation by tourists, 与股份或股权无关，故修改建议如下：

（对游客来说）吸引力不大的主题公园

供參考。