I have no friends who are remotley at my skill level to ski with, and i end up doing solo day trips to tahoe anyways. so i always chat up people on the lift and take a lap or two with them. thats how i get to know all the hiden gems of kwood, alpine etc; by befriending a local, and then ripping with them for a few hours.
It has its downsides though. I was really, really baked earlier this year at kwood riding the lift with some middleaged gentleman who looked like he had a condo at the base, but probly didnt ski very well(you know, that type?). Anyways, i was doing the usual "hows ur day going?" routine, and it somehow morphed into talking about a skyscraper being built in downtown SF which i happened to be working on... problem was that he was working on it also...in fact we had actually been doing coordination items with each other earlier in the week. So i had to take a few laps with him and struggle to keep a coherent semi professional conversation going whilst being incapacitatingly stoned.