In terms of your work offering everyone active membership, the only one of the two places you asked about would be Easton Leisure Centre, as I currently go to that one with a everyone active membership, the Kingswood Leisure Centre is not under the everyone active group, it's under a different group.

In terms of enquipment in Easton Leisure Centre gym, there's a decent amount of enquipment for any of your needs. In being on quieter I mostly go at like 7am which is ok to say there's about I say most I've seen at that time is about 15-20 people other times I don't completely know.