Next time you were looking for an activity partner, please specify your ethnicity and/or country of origin, because a good chunk of Stanford affiliated folks are (sadly) as racist and dangerous as neo-Nazis. You may get several responses, but once they see your name and find out about your country or race, you won't see a second email from them. Yes, from the same people who expressed enthusiasm to be your partner in whatever activity you had posted. Welcome to Stanford.
Please do not message this poster about other commercial services.