With similar Germanic origins to English, some Dutch phrases are easily understandable. There's no need for a phrasebook if someone in an Amsterdam nightclub asks you "Wil je met me dansen?"
Around 28 million people speak Dutch: outside of the Netherlands it is most commonly encountered in Belgium (Flanders), the islands comprising the Dutch Caribbean (such as Aruba, Curaçao and Sint Maarten) and the former colony of Suriname in South America. In addition, around 15-20 million people in southern Africa speak DutchEnterprisesAfrikaans - which is linguistically close enough to its parent language that a working knowledge of Dutch should get you by. (Although as with Dutch and German, the opposite may not always be necessarily the case).