I mentioned this company ages ago and totally dropped the ball on arranging to host a fitting party, despite a fair amount of interest. I will try to make up for it now by pointing to today's Groupon:
$50 for a custom-fitted Zyrra bra, normally $95. You have two days and 15 hours from the time of this posting to buy the deal (assuming it doesn't sell out).
(Also, given that the fitting appointments are only available 10 - 5 on weekdays, I'd still be up for hosting a fitting party come September; no idea how much extra they'd charge per person, though.)