“Raising the bar” comes from track and field events High Jump and Pole Vault. When the competing jumpers have succeeded in jumping over the bar, it is raised and keeps getting raised until only one person can jump over it. It is extremely doubtful that a word from ballet would become part of a mainstream phrase. Lifting your to a barre is trivial compared to a 20-foot pole vault jump.
Dump hotel room? Sir, I will have you know that at Château de le Scum, we provide the finest accommodations for our riffraff guests. For example, all our cockroaches are of purebred pedigree stock
Yes, in competition many racial and ethnic slurs, sexuality, and gender insults are banned.