The question was asked on a Benidorm forum a while back when a rugby team wanted to try this feat.
But would it be possible in the Benalmadena/Torremolinos area?
Taking into consideration inflation, maybe €1.20/€1.30 might be an easier target. Afternoon prices possibly will give a better advantage.
Can you locals/regulars/expats provide any bars where this may be possible? Maybe 10 might be unrealistic, but who knows? Are there more than 10 even?