What do restaurants hotels and retail stores need to provide to disabled people?

The term disabled covers a massive range of issues and answers here might not include every possible type if disabled issue.

Firstly appropriate access to the premises

Clear movement around the environment

Staff trained to assist and understand the requirements of disabled people

Clear directional signs

general assistance in reaching items, checking labeling,

Toilets that those with specific needs can use

Loops for those deaf patrons to be able to communicate

Lifts to upper floors where stairs are an issue

Clear walkways

suitable checkout areas for solo wheelchair uses to reach conveyor belts

(Food establishment) Someone to either read to or have menus for the sight impaired