In reply to Keendan:
I wouldnt take a group to Ogle - some pretty shoddy old bolts there and the climbing is an acquired (or not) taste
The Angus quarries are pretty grotty, and often damp, defo a high summer location at best. Not for aesthetics!
Robs Reed is nice but with a group could be tricky as parking is limited and an important consideration for access relations with the farm
Kirriemuir is very amenable for groups, parking, flat ground etc but not much in the 7s
Ratho has only a few route, but it is very accessible!
North Berwick is also very accessible for groups, decent short routes up to the low 7s, easy parking and great fish&chips after in NB
Weem prob has the best quality of routes in the range, plenty parking there by the church, nice woodland setting. Best stick to the main face with a group, some of the outliers are a mission to find.