I found myself at home in Palo Alto the other day, involuntarily offline thanks to a wonky broadband connection. So I headed to Coupa Cafe to get caffeine and log onto its Wi-Fi hotspot. And, just maybe, overhear an entrepreneur and venture capitalist doing the Sand Hill Road mating dance. Greylock's David Sze likes to hold meetings there, as does LinkedIn founder and angel investor Reid Hoffman. But it's gotten so popular and so packed, that I wasn't able to find an empty outlet — let alone a seat. What to do?