Some more AMS info:

Café "De Jaren" for brunch, lunch, coffee , apero
Restaurant: "le Garage" or "Bond"
Café Loetje -> typical Dutch food
Off course Vondelpark and Amsterdam Oud-Zuid (where the above mentioned hotel is located) are just realy nice and trendy areas to stroll
What's really fun, especially if the weather is sunny, if driving your own electrical boat: http://www.sloepdelen.nl​

Have fun!