Classical, jazz, rock, folk, gypsy jazz, picking-blues, Latin styles, .... individual lessons are also flexible enough to concentrate on sight-reading, composition, improvisation, arrangement, jazz harmony, classical harmony... 

A lot of good active professional musicians have been trained too unilaterally, often towards only one musical style, and are therefore constrained in their further musical evolution. Time to expand knowledge or to explore new musical horizons? 

Production, Home studio, mixing and mastering techniques, effects, live setups for guitarists, tuning and customizing of instruments, Event management, Creativity, Concept, Human resources, promotion, websites...