Taking a break in a museum café to give your weary legs a rest: lovely. It gives you a chance to talk about the collection you've just seen and let it sink in, to recharge or even just to satisfy the appetite you've built up. I've been guilty of all three. And what's great is that the quality and atmosphere are often surprisingly good: so good that you visit the café again, even if you're not hungry or tired, and don't feel like talking about the paintings that you just saw. Guilty again.
Fortunately, you don't always need to buy a ticket to get into a museum's café, which is great if you don't feel like art, but you do feel like eating. Or if you just want to have lunch in a different kind of atmosphere. The Plantage has enough of those kinds of places, and I personally recommend the Tropenmuseum's Grandcafé.
The Grandcafé offers exotic dining in an elegant atmosphere. While it tries to appeal to nearly everyone, I find it a bit too dark and chic, but its impressive views out over the recently redone Oosterpark, and into the museum, make up for that, as does the menu. The ingredients are locally sourced, but have an exotic twist. There's also a special children's menu. I found the cakes a bit dry and uninviting, but I can easily recommend lunch or dinner. Try a banana beer, or a cocktail served in a white pineapple! Don't let the interior turn you away: let the menu entice you, because the Grandcafé De Tropen is there for everyone!