Jilly, there was a time when we were a one-car family. My husband worked several jobs and I was at home with three little ones. I felt stranded because I had to wait for him to come home in order to get the babies to the doctor or to the stores.
I'd walk the kids to the grocery market nearby and to the schools and park but that was it as far as where we'd go. The bus system here is sketchy plus it was too hard to get the stroller or wheelchair on board.
It is so convenient to have my own car. Could I give it up? I suppose. But I'm the designated driver to get my elderly folk to appointments now and my DH likes not having to drive me to boring places he'd rather not go.
Stores are within walking distances and we have the flexibility to schedule appointments when my DH can drive me or lend me his car. We discussed downsizing to one car but he said he'd rather I have it in case of emergency.
Sometimes it does not take a lot to make someone happy or feel good so when it's something like wine (or Pepsi in my case..haha) and you do have the money to buy some sometimes then I say do it. Life is short anyway so when you are lucky enough to have found something you enjoy enjoy it!