Not sure exactly when all of the speculation began regarding weed. But, I would suggest that IF it is speculation in regard to searchers being ask to look for a pipe (no link for that, stated on this forum per local searcher), that the pipe is just as likely to have nothing at all to do with weed but rather having just left that Artmosphere Lounge.
Artmosphere is said to be a hookah lounge (I believe a local has stated this as well), in addition to being a restaurant, concert venue, etc. Hookah lounges/bars seem to be very popular and are everywhere. Just throwing this info out there as it makes more sense to me, personally. I, myself, am very uncomfortable with speculating otherwise regarding the weed issue.
Some Wiki facts on hookah/hookah lounges:
-- an establishment where patrons share shisha (flavored tobacco) from a communal hookah placed at each table.
-- Hookah lounges are mostly found in college towns and urban areas and are regarded by some as a novel and chic way to socialize and embrace multiculturalism
-- Many hookah lounges in the United States have chic or modernistic elements such as glass tables, plasma televisions and oxygen bars.
-- The important thing is not what you put in the pipe, but who is with you while you're smoking...it's a complete experience...in a cafe like this one, you find the good people, the old people, the interesting people.
[ame="http://en.wikipedia.org/wiki/Hookah_lounge"]Hookah lounge - Wikipedia, the free encyclopedia[/ame]
Also, things I gathered from reading:
the herbal type is very common because it contains no tobacco, or nicotine. apparently using a hookah pipe, the smoke is drawn through cold water to cool and filter it.