Amsterdam
There are no restrictions dress, although the Dutch are fairly conservative dressers themselves. Normally men wear suits and ties business meetings - women wear equivalent business apparel - but good-looking, casual attire works fine most other situations. A sweater comes handy night, even summer, and a windbreaker or coat will be needed mid September early June. Pack a small folding umbrella and a rain cape.
The Dutch government requires that all taxes and service charges be included the published prices of hotels, restaurants, cafes, discos, nightclubs, hairdressers, beauty parlors and sightseeing companies. The 10% service charge (tip) is always included the bill. Additional tipping is appreciated if the service is attentive; people round their bill anywhere a guilder or two an appropriate, somewhat larger figure. This should be done when paying, and small change should be left the table.