Enjoy Shanghai discount card - what are the Real offers?

I bought an Enjoy discount card some time back. It was recommended to me, and I thought why not try it out. The card itself offers 10% discounts at a number of places. The voucher book is even more impressive, but needs careful interpretation, as venues reserve the right to completely ignore whatever is written on the voucher.

If you're the kind that carries cards around with you, and can actually remember to produce the card, then it's for you. If you like to travel light or always forget like I do.... then maybe think twice. It makes perfect sense if you have a regular place on the list. But the list isn't at all extensive.

The card costs 300 RMB. It's quite easy to save 300 RMB off the card, but then remember that your friends save as much as you do - it may take some time before you personally recoup 300 RMB.

Also, what I didn't appreciate is that the card operates from April each year. So the best time to buy one is in April. So I've bought a card at full price which is only good for 6 months. Oh well, I can only make that mistake once. Of course any consultant could advise enjoy that they could boost their sales if they were able to release cards every month.... But then it's probably a one man company, with a very happy chappie laughing away somewhere busy counting money, who really couldn't be ars*d with optimising his/her sales...

My experience of the vouchers so far:
KABB, xintiandi
Voucher said: buy one main meal, get one free
Restaurant said: order any main meal and get it free (brilliant, even better!). one expensive grill dish, and everyone else ordered cheap pasta stuff.

Manifesto Bar, julu lu
Voucher said: 50% off overall bill, no limit
Bar said: As stated, but not including food or bottled drinks. Cocktails and soft drinks are definitely included.

Senses Wine Lounge, wulumuqi lu
Voucher said: 50% off bill up to 2000 kuai
Bar said: as stated, except for items already part of weekly special offers (mon wine 25 kuai a glass, tues wine bottles 30% off, wed and thur add a main course to a bottle of wine for 1 kuai). Brilliant!

Element Fresh, portman hotel
Voucher said: One free smoothie
Restaurant said: Buy one smoothie get one free

Readers, do you know of any other good special offers / Enjoy deals / variations from Enjoy vouchers?

A bit of chinese:

Discount Da3 zhe2 打折
Coupon You1 dai4 quan4 优待券 (as per my dictionary)
Favourable (price) You1 hui4 优惠
Special offer coupon You1 hui4 quan4 优惠券 (i think, but i might be making this up)