I love the story Ren Klyce tells in his Soundworks profile for Benjamin Button about how one of the field recordists recorded ambiences inside retirement homes to capture completely natural and real conversation and ambience.
I have also heard from a story of a recordist using a pair of glasses with microphones mounted on them to record ambiences of bars and restaurants.
What types of things have you done if you've needed to get ambience in this fashion?
Also, is that glasses set-up (if it exists) expensive?
And one more thing: If people aren't aware they're being recorded for a big-budget feature, will there be legal issues down the road if someone is prominent in the mix and recognizes their voice? (if this could ever happen...)
EDIT: Quick search yielded this: http://www.linkwitzlab.com/images/photos/stereo-mic2.JPG Would this sound good? I own a few small B&K capsules I could possibly do that with...
Maybe I'm making this too complicated... I suppose it would be far better to just use an ORTF or XY bar with a couple mics set up and positioned behind the bar well before it gets busy and call it a day...