Thanks for all the input everybody. I forgot about this thread, so I thought I'd update it.
I did wind up asking for a change of venue, and we went to a nice restaurant in the same neighbourhood so it was still convenient for both of us.
I had a nice time, and didn't feel tempted to drink at all, whereas I'm sure I would have felt at least a small craving if I'd gone to a pub.
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"I danced in the morning when the world was begun. I danced in the moon and the stars and the sun". From my favourite hymn.
"If you see the wonder in a fairy tale, you can take the future even if you fail." Abba