Some office buildings wont let you in to some floors. Bribe the security guards with samples. A good way to do this is to just hand out a sample before even talking. Hand it out, and tell them about what you do. Don't forget that these guys are also customers.
One thing though that I've found is when you give good ideas to people you'd be surprised at the amount of excuses they have for not following up on suggestions. The lack of "oomph".
What I'm saying is this. It's easy for someone to write a plea (as was done here) for help on HN (or anywhere). That takes almost no effort at all (like a magic "diet pill" when you want to lose weight). Let's see if the entrepreneur actually follows through on the advice that you gave.
(If you do a follow up post or anything on what happens here please email me in case I miss it because I'd like to know the outcome positive or negative to the outbound sales effort).
Hitting meetups - well it might be a good excuse to wait. You know, that meetup tonight is not so big, I will do Thursdays. Plus Thursdays, well the venue does its own catering and won't let me in till ....
Get outside the nearest two pre made sandwich places - and success is selling twenty lunch packs to people who otherwise would have bought a sandwich - this lunchtime.
Get out if the office and get out now.
Good luck :-).