You are right Lizzie the Jobcentre advisors are in a vulnerable position as the face on view first met by the public and you cannot always predict what is going to happen, that is true.
I haven't been in one for a few years now so things may have changed for all I know and it might depend on the area the centre is in. This one was opposite three pubs which didn't help. It did get moved eventually.

The last time I accompanied my son they had just brought in a self-use computerised system to find listed job details of which could be printed-off which I thought was a good idea and also still the 'old' way of advertising job advert details written on referenced cards in the different job sections.