Fase 2 has the hottest girls of any of the strip clubs in Medellin. Bar Isla is close though.
But a lot of the prices in both these places are ridiculous for Colombia. Beers costing more than $10? The girly drinks costing $15 to $20? Lap dances for $40?
But hey, you can bang a hot stripper in the backroom for around $100. Try that in the USA or UK.