Hi janib,
Sorry for the long reply - the person who knows all about this tour was on holiday last week!!
So, your question was if you have any spare time for the Hard Rock Café. Well, it all depends on whether you do both optional excursions - and if this is the case then, unfortunately, you will probably not have enough time. This is because all included excursions are pretty much full days too.
However, if you choose not to do both optional excursions, there is more than likely to be enough time for you to visit the café.
I hope this helps.
Kindest regards,
Monty