For me it´s hard to meet people outside NEST being european (mainland). Appart from our british friends, there´s not that many of us around.
Still, and outside gatherings, the only time i went to the USA in more "usual" hollidays, i did meet and had dinner with a friend from TMF. And i´m quite sure i´ll have more at the table if i visit again in the future. Ahh, this guy i knew from our 1st NEST when we were both newbyes.
Aside from USA, i did meet a portuguese girl through TMF. It was a bit crazy and eventually we ended up on separate ways. I still have her contact and usually tell her about my experiences at NEST.