Google it and you will find a LOT of problems. I've been leary of them because of this. For example, they were offering seriously discounted tickets to our local orchestra. Almost bought some, and then discovered by looking at available seats for the ones I'd want to attend, that there were virtually NO seats available (scattered singles). So they were selling 100's of these vouchers (according to their ticker) and there were maybe 50-100 seats available total? Someone was going to be disappointed. Same problem with massages...selling hundreds, and there aren't enough appointments available to fill the demand.
I'd probably call the studio before I bought a photo package from Living Social and understand how difficult it is going to be to use it before I bought.