Thursday only, doesn't say anything about needing to have a starbucks card.
They will grind the coffee for you.
T&C on the voucher
Just ask your barista to grind it for your filter, cafetiere or espresso machine. You'll find a wide variety of regions and blends to choose from, including Starbucks limited edition Tribute Blend, with its delicious spicy, bold flavour.
Stop by your local Starbucks on Thursday March 24th and enjoy one complimentary bag of whole bean coffee when you purchase your handcrafted beverage* and present this voucher, either as a printout or on your mobile phone.