In reply to John Aisthorpe:
I reckon Traprain is yer best bet. Its south facing, has a pleasant outlook and mini-mountain-crag feel, and has lots of interesting routes Severe-HVS, with generally straightforward top-anchor placements. The closest parking area is a narrow roadside verge, however, so if you are going with a big group, please consider parking at the north side carpark and walking round (a pleasant 10-15mins)
Rosyth's pretty grotty.
Cambusbarron is good and the Contracts area is good for groups, but perhaps more for HVS-E1 to get the better routes
Auchinstarry is popular with groups and topropes straight from the car-park, but the better routes are on the back side of the quarry and so less suitable for groups. Also, similar to the limekilns comments - please dont set up topropes on Nijinski - its becoming unbearably polished on the crux, please have thought for the leaders trying this move over sketchy side-runners.
Northumberland (Bowden etc) has great (hard) VSs but they will be spread far apart, and top anchors are often not that bomber. The sandstone is also erodable so make sure its 100% dry and extend any topropes well over the edge.
Dunkeld Crag a Bairns is perhaps pushing the 1.5hrs, but there are some great VS routes there