Hello Vertigoman (have you met Dizzy by the way?.... (sorry...get me coat.....))
As far as Ben Nevis routes is concerned, I think that if you're shaky on exposed things, your best bet would, in fact, be the Tourist route. I dont believe there's another route on this hill that isnt exposed. The usual alternative to the Tourist route is the Carn Mor dearg arete and, whilst this has easy scrambling, it is fairly exposed and the climb up to the summit is long and steep. (In fact its a superb but strenuous way up the hill - if you search images for "CMD" or "CMD Arete" or "Carn Mor Dearg" - you'll likely find lots of pics of it. You should be helpful to allow you to decide whether or you'd cope with it. If there's 12 others in your group, there might be others who would also prefer the tourist route on the day.
If not -soddem (!)
The tourist route is a fairly standard sort of long slog - excellent if you like people-watching.... Its reasonably (but not completely ) safe but has no exposure.
For post-Ben boozeramas, there's a pub/restaurant just a little way up the road from the main campsite in Glen Nevis.