The Greenhouses are clubs now, so you either have to be a member or a tourist to get past the security bar

Really nice ambience, if a little uncomfortable seating, but all in all nice to get wasted. Nice toilet.
Marijuana menu: Best Super Silver Haze ! Neville's Haze also very good, Hawaiian Haze almost better ! Great menu all in all, if not the cheapest. Also sell half grams.
Service & staff: Depends on who serves. Mostly friendly, but one time the bar girl kicked everyone out at 22:45 on a Friday evening even though they are supposed to be open till 01:00...
Summary : The Greenhouses are clubs now, so you either have to be a member or a tourist to get past the security bar. This one was our main base last trip and it is one of my top coffeeshops in Amsterdam.