1st get a free 15 day membership to Citibike
Here.
Then go to
this link, you will also get an email about it after opening Citibike.
It seems to be on Citi's Company Plan, Details in Pic
One Citibike rep told me it is $30 off membership + $30 in Driving credit. Pic seems to say otherwise.
May be limited to NYC?
"You're requesting the Citi Bike Members group discount" is what shows while signing up.
It applies this promo code while signing up ($20 off Application): MMJH15
Offer valid for new members only and to first year of membership only. Limited offer must be redeemed by December 31, 2015. Not valid with other offers or promotions. Membership renews at $35 annually.