何か出そうな定番の場所ですからね。自動演奏するグランドピアノや独りでに動き出す人体模型や。

。。

It's the classic kind of place where you'd expect something to come out. Self-playing grand pianos, anatomical models that move on their own…

Literal

Something come-out [likely-そうな] classic [gen-の] place is-[because-から] [ね]. Self-play grand-piano [and-や] on-its-own-movement-start human-body-model [and-や].

The atmosphere of a ghost story. 何か出そうな ('something likely to come out') uses ~そうな as the attributive form of the apparent-auxiliary ~そう, stacked with 何か ('something'). 出る ('to come out') is the set verb for ghosts/spirits 'appearing.' 定番 ('classic, standard, tried-and-true') describes well-established tropes. 独りでに ('by itself, spontaneously') is a crucial adverb for ghost phenomena. 人体模型 ('anatomical model') refers to the half-life-size plastic human models in school science rooms — a classic Japanese school-ghost-story element.