It’s Friday afternoon — cocktail time for John Blazo. But instead of elbowing up to a bar, he sank into a leather recliner at a wellness spa in Charlestown, cracked open a can of Raspberry Lime Polar Seltzer, and rolled up his sleeve. For the next 45 minutes, the “cocktail,” an IV solution of vitamins, […] The post People are spending hundreds of dollars at IV drip bars in Boston. Are they worth the hype? appeared first on Boston.com.