ERC are great, everyone was very friendly and welcoming to me. I made lots of new friends and Lightman used to tow me back to the chaingang on his mtb when i got dropped on the climbs on Tuesday nights 🙂
Go with the ONLY official ERC ride which is the 9.50 development run which will have small numbers and teach you to chaingang, then work your way up the groups. The chaingangs won’t stop if you get dropped or have a mechanical btw but the development run will, as will the social sunday ride (which is slow).
As for the other comments, i’ve heard similar but its like banging your head off the wall – the rides you see aren’t ERC official rides, yes there’s some ERC riders in there but there’s lots of other clubs that join the chaingangs too. In the summer when i’m out more often with the club i have never seen more than 2 abreast.