Here is my 2 cents:
Often waiting area seating in poor urban settings must be extremely durable / almost abuse-proof.
If it’s a clinic and the wait times are not terribly long, I suggest a hard molded plastic chairs with metal legs.
They can still be comfortable and definitely cheerful / colorful.
If however it’s a hospital ER, where the wait times are often quite long, I’d opt for comfortable upholstered seating.
I’d select a line that is very strong and has an excellent warranty.
(i.e. nemschoff)
The upholstery should be a very durable crypton or vinyl The seat cushions on the upholstered seating should be spec’d as removable with spare cushions ordered.
Regarding Bariatrics - I have not heard of codes mandating seating minimums (yet), but that does not mean that it has not been done.
Folks from CA should be polled about this.
Thanks much,
Sheila