It's surprisingly hard to find a "coffee" shop when you visit Amsterdam. I swear I wondered around looking like a jackass for half a day asking people "do you know where all the coffee shops are?"..."yes right there"..."no I mean like the weed coffee shops." ... " [silence]"....."uhhhh, I'll try to find it myself." But to answer your question, i noticed more tourists there for the art rather than the weed and red light girls (although both are still popular)