Well, I'm no big fan but, in defence of EFDSS:

No one flooring material is suitable for all dance forms. The group organizer and whomever is/was in charge of permitting the space should have known better from the start. If memory serves, Sharp House has (had?) a sprung pine floor. Fine for social dance but totally unsuitable for any percussive genre, eg: step, tap, flamenco &c.

Maple or hard oak is the only way to go for the right sound and durability. These days it costs a medium fortune to do it right.

Not that it matters here but, neither of the above would be optimal for the really physical stuff like ballet, urban or modern.