[Mixtape]

For a high-quality brew, you absolutely want to buy whole beans and grind them immediately before use. However, you definitely can buy pre-ground beans in the states or grind them in-store if the market offers a grinder. Though, I think the point of the response above is more to demonstrate that either option is impractical in waiting rooms since you either have to ask a guest to grind their own beans or serve them grounds that have likely gone stale from lack of use. Either is a subpar option.