Hey, it works for elementary school kids. Many six-year-olds meet their best buddies on the bus because 1) they live in their neighborhood (what could be more convenient?), 2) they are on the same schedule, and 3) they know the same people (“Susie has cooties.”) Not only is this technique eco-friendly, it makes sense on many levels: you already know a lot about these people (and if you don’t, you can always ask someone in your office who knows them better if they are friend-worthy), they have already been screened for drug use (score!), you already have a few things in common.