Yeh, remember these well Steve.... probably one of the "first" two roomed events.....
Not sure I would have could called either the "main room" though as they were of about equal size, equally as full and with people moving from one to the other on a regular basis....
Although because billed as a Northern & Modern Soul alldayer probably assumed by some to be a Northern event with a Modern Room purely because Northern is mentioned first ....
Romeos - large open rectangular dance floor and used as the Nothern Room.....
Juliets - slightly smaller "curving" shaped dance floor with that wide mirrored pillar in the middle used as the Modern Room.....
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Interestingly to me some "mates" who used to "diss" both NS and MS (without knowing what they really were) got into both through these R&J's alldayers as in it's primary use as a night club, Romeos was the charts of the day plus the usual Beetles, Mowtown, etc., whereas Juliets was "geared" more towards the Jazz Funk/Rare Groove/House/80's Soul type sounds....
These regular "Juliets" mates actually became "first timers" to Modern Soul by attending the alldayers that were advertised in the corridors of R&J's purely out of "curiosity" as to what MS was.... also eventually venturing into Romeos NS room and "getting it".... they then were regulars in the NS and MS Rooms of the times (e.g. Braford's Queens Hall) up and down the country.... in the word's of Blair, "education, education, education" ....