I am most enamoured of this idea of spending a week at
Kripalu. The intersection between dates I can go and "value" weeks when the price is significantly lower are Dec. 6 - 11 and Dec. 20 - 24 (check in on Sunday, check out on Friday). The price ranges from $400 in a dorm (smallest dorms are six people; no idea if they're still available) to $460 - 580 for a standard room (some singles, most doubles with either one queen or two twins). That includes meals, yoga classes, and standard activities.
Company would make this more fun and cheaper! (And also, er, probably involve fewer bus rides for me. ;-) Who's in?
Poll Edit: My work deadline has abruptly shifted to late January, so the week of Nov. 29 - Dec. 4 is now also a possibility. Can't edit the poll, though, of course.