OOOH, that does sound a bit cattle marketish doesn't it.
We had ours just after they returned for the start of the new term. DD got given a sheet of paper and had to go round making appointments for us - each one was given a five minute slot. WE found we didn't get in to see everyone because for some of the teachers there were more children than there were slots so they prioritised by only seeing those children who had problems and then allocating the remaining spaces by lottery. It meant we didn't get to see all the teachers but we did get to see most
The one problem we found with dd's appointment making was that some of the appointments had a half hour gap between them, but on the upside it gave us a chance to get from one side of the school to the other (most 'interviews' were held within the subject teachers classroom with a few overspills in the hall). The school was also very good at putting on drinks and biscuits, making it a social occasion too and there were books on sale for those interested.
We started at 4.10 and finished at 6.30!! It was a great evening because everything said was very positive and only reinforced our choice of schools for dd.
Good luck with your evening and hope you manage to get to all those you want/need to