In reply to 0153453:
Do a search on here, this question comes up every week
From experience a surefire way to make sure your girlfriend loses all interest in climbing (i'm assuming your keener than her but obviously not always the case) is to make her endure a miserable, cold, wet weekend climbing in the Peak District.
If you are really set on coming and climbing indoors two days at Awesome walls may be a bit overkill. There are five main walls in Sheffield, with other smaller walls. I'd recommend a day at The Works.