Does anyone have advice for getting in and seeing offices at startups/companies in the valley for people that are coming in for startup school, tours and whatno

Does anyone have advice for getting in and seeing offices at startups/companies in the valley for people that are coming in for startup school, tours and whatnot? I found the info for the Airbnb party on their blog (http://blog.airbnb.com/ http://blog.airbnb.com/), that should be cool.