I don't know Aberdeen, but when I used to organise stuff like this occasionally for my climbing club in Edinburgh, I often found that city centre pubs with a function room were easiest. They are often free to hire midweek (it's guaranteed custom for the pub) and they often have a projector already in place. Good luck.
News BMC Publishes New GB Climbing Performance Department Proposals
The British Mountaineering Council has published a series of papers outlining new proposals for the oversight of GB Climbing, following management issues related to the internal business unit last year and a member-led proposal to...