After Allegro Pianos opened its Long Ridge location, it only made sense to tack on a comprehensive, multi-instrumental music school beyond the showroom. Here, students have access to acoustically isolated practice rooms, painstakingly maintained instruments and a recital hall that also occasionally houses Stamford Symphony and Schubert Club performances. The school accommodates students on an as-needed basis and will contract teachers and find instruments for pupils ages 4 to 94.