i trade from home. i miss the 'good' people i used to work with in nyc - i don't miss the office politics, the irritating people, the commute, or things like that. i like coming downstairs and being able to work in casual clothes, or shorts, or whatever i feel like wearing.
as others have mentioned, i talk with a few people periodically, a couple who are PT traders, and a couple who are FT traders in non-equity products. one of my good friends is a FT trader, he's 'impressed that i (or anyone) can trade FT with my own money, i'm impressed at the stuff he trades with the firm's money and how good he is.
i also break one of the other rules; i'm taking care of one of my children during the afternoon (wife takes care of both kids in the am). i usually don't put on new trades after 1 pm, so i'm only looking to exit trades, not put on new ones.
in fact, i'm going to nyc tomorrow (train) and will see a couple people during the day. unfortunately, the ppl won't be around after work so i'll fly solo, but at least i can catch up with some of them during the day. and it's been 8+ years that i've been FT trader...