Simplify the following text for a Grade 11 native English-speaking person.
Original: Evans ' basement apartment had become the meeting place for several young musicians and composers ( including Davis , Roach , pianist John Lewis , and baritone sax player Gerry Mulligan ) unhappy with the increasingly virtuoso instrumental techniques that dominated the bebop scene of the time .
Simplified: Davis used to meet other musicians at Evans ' house , like Roach , the pianist John Lewis and the baritone saxophone player Gerry Mulligan .