the discoteca was called mar blau like the hostal (different owner though) but it was located in front, where they built in recent years that complex of ocher/brown apartments. the club, the only one back then, was open air.....
when it first opened, in 1951 (!), the sala de fiestas mar blau was located in what now is the terrace of the hostal (overlooking p.d.b./etc). as there was 3 rooms just next the authorities thought it was a kind-of-brothel like other similar salas de fiestas in spain (first boogie-boogie with some belgian chicas, then shagga-shagga) so they had to move a bit further down (where now you find the new complex of apartments).....
on a curious note, juan (the owner of the hostal) started working at the sala de fiestas the 3rd day after its opening cleaning glasses. as he was still a wee boy he had to stand on a box for a few years so he could reach the sink ! !
the first sala de fiestas was the bar/restaurant mar blau in puig des molins in ibiza town, a venue that opened the 29th of june of 1951.
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Not true:Lolas were the first in 1965
Mongibello, the new hotel by Concept Hotel Group, "will have a secret room named Lola's, as a tribute to this legendary Ibiza nightclub of the 60s and 70s"*a club which strangely never seems to get mentioned on this forum (?)