Learn Hardcore Korean: chekeuaus huedo robi hyugesireseo daegihal su isseoyo. - Even after check-out, you can wait in the lobby lounge.

-도 adds the idea of “even/also,” giving a slight emphasis: “even after checkout.”
Without it (체크아웃 후에…), it’s a neutral “after checkout,” with no extra emphasis.
So 후에도 can imply “It’s still allowed even after that point,” which sounds a bit more reassuring or contrastive.

Why is it 에서 and not 에 in 로비 휴게실에서?

에서 marks the location where an action happens. Waiting is an action, so 에서 is used.
에 marks location of existence or destination. You’d use 에 with verbs like 있다 (to be): 로비 휴게실에 있어요 = “(I) am in the lobby lounge.”

What’s the nuance difference between 대기하다 and 기다리다?

대기하다 = “to wait” in a formal/official context (announcements, signage, customer-facing language). It sounds more institutional.
기다리다 = everyday “to wait.”
In a hotel notice, 대기하다 sounds natural; in casual speech, 기다리다 is more common.

Is 로비 휴게실 natural? Would people say something else?

It’s understandable, but hotels more often say 로비 라운지 or simply 로비.
Natural alternatives:
- 체크아웃 후에도 로비 라운지에서 대기할 수 있어요.
- 체크아웃 후에도 로비에서 기다리실 수 있어요.

Can I say 체크아웃한 후에도 instead of 체크아웃 후에도?

Yes. Both are correct.

What about 체크아웃하고 나서도 or 체크아웃한 다음에도? Any nuance?

하고 나서도 / 한 다음에도 sound slightly more colloquial and step-by-step: “after (you) do (the checkout), then also…”
후에도 is concise and a bit more neutral/formal.
All three are fine in everyday use.

Is 대기할 수 있어요 saying I’m allowed to wait, or that I’m able to wait?

-ㄹ/을 수 있어요 can mean ability or possibility. In contexts like hotel policies, it often implies permission.
If you want to explicitly express permission, use -아/어도 돼요:
- 로비 휴게실에서 대기해도 돼요. = “You’re allowed to wait in the lobby lounge.”

How would I make this more polite/formal for customers?

What politeness level is …있어요?

…있어요 is the standard polite “-요” style, suitable for most customer-facing speech.
More formal/businesslike writing often prefers …있습니다.

Is the spacing correct in 대기할 수 있어요?

Yes. Key points:

할 수 있다: There’s a space before 수 because 수 is a dependent noun. So: 할 수 있어요, not 할수 있어요.
Particles attach without spaces: 후에도 (no space between 후에 and 도).

Could I use 뒤 instead of 후? Like 체크아웃 뒤에도?

Yes, 뒤 works in everyday speech: 체크아웃 뒤에도…
후 feels a bit more formal/literary; 뒤 is slightly more colloquial. Meaning is the same here.

Can I put 도 on the place instead, like 로비 휴게실에서도?

Yes, but the emphasis changes:
- 체크아웃 후에도 로비 휴게실에서… emphasizes the time (“even after checkout”).
- 체크아웃 후에 로비 휴게실에서도… emphasizes the place (“you can wait in the lobby lounge as well (as other places)”).
You can even have both in some contexts: 체크아웃 후에도 로비 휴게실에서도… (both time and place emphasized), though that’s usually only when contrasting multiple times/places.

Is 체크아웃하고도 okay?

-하고도 often carries a “despite/even though (contrary to expectation)” nuance. So 체크아웃하고도 can sound like “even though you checked out (surprisingly)…”
It’s not wrong, but in neutral information or policy statements, 후에도 is more straightforward.

Does Korean need a subject here? Who is doing the waiting?

Korean commonly drops obvious subjects. Here, the implied subject is “you” (the guest).
If you want to include it politely: 손님께서는 체크아웃 후에도… 대기하실 수 있어요/있습니다.

Any other natural rephrasings a hotel might use?

How do you pronounce the whole sentence?

Revised Romanization: Chekeu-aut hu-edo robi hyugesil-eseo daegihal su isseoyo.

Tip: 체크아웃 sounds like “che-ku-out.” The ㅔ/ㅐ are short; link 체크-아웃 smoothly.

Is 퇴실 a good alternative to 체크아웃?

퇴실 is a native Sino-Korean term meaning “check-out (leaving a room).” It’s common in hospitals, dorms, notices.
Hotels in Korea often use the loanword 체크아웃. Both are correct; 체크아웃 feels more hotel-like:
- 퇴실 후에도 로비 라운지에서 대기하실 수 있습니다. is also fine.