Good for you, You're on the road to better hearing. I hope the hearing aids you're getting from Costco (or anyone else for that matter) are equipped with both telecoils and Bluetooth technology. Systems that connect with telecoils and BT are often installed in performing arts centers. They send the dialogue directly from the stage/speaker to your personal hearing devices. No background noise; no interference. Telecoils do not add cost to hearing aids. Often the provider doesn't even mention them or even activate them if the buyer doesn't ask.

It pays to be a consumer of these products.

Costco allows a very good trial period. Be sure to use those new aids everywhere you like to go.

Not everyplace has hearing assistive technology installed even though it's mandated by the Americans with Disabilities Act in public venues. Problem is they don't have to provide it unless it's requested, and once requested it takes time to get it installed. It also costs the venue $, but in the long run will draw more patrons who'll be able to enjoy using it.

Are you willing to advocate for hearing assistive technology at the next play you go to?