No. A public entity or private business is not responsible for the care and supervision of a service animal.
Material in an accessible format, such as Braille, is an example of an auxiliary aid that can be provided on an as-needed basis. However, knowing your audience is key.
Promotional and registration materials for the seminar should include and explain how the public may request a particular auxiliary aid or service. This information should include contact information and a deadline for requesting individualized accommodations to ensure there is enough time to order or produce the Braille materials.
Both the hotel and the public entity or private business renting the hotel meeting space have responsibilities under the ADA to ensure that everyone regardless of disability has an equal opportunity to enjoy the services and facilities offered by your event.
If the hotel provides temporary stages or raised platforms, they must make these temporary elements accessible to people with disabilities unless doing so would result in an undue administrative or financial burden.
A public entity or private business conducting a workshop cannot require an individual with a disability to bring another individual to interpret for him or her.