“right up until sunrise”
Right up until … emphasizes continuation to the very endpoint. The singing and laughter did not stop before sunrise.
A2-16 / CEFR A2 / EPISODE 16
Discussing noise at a hotel
SceneAt a hotel reception. Frank complains about noise.

WORDS & CONTEXT
Right up until … emphasizes continuation to the very endpoint. The singing and laughter did not stop before sunrise.
For a telephone line, busy means engaged, rather than occupied with work. Frank tried calling reception repeatedly, but the line was busy each time.
Anything else means something more. The receptionist asks whether Frank needs anything further, and Frank answers that sleep is all he needs. Here Just sleep, please. is not asking the receptionist to sleep; it is a short way to state what he wants: "Being able to sleep is enough."
Literally "I don't need a second concert tonight." Frank compares last night's singing next door to a first "concert" and politely adds a touch of sarcasm: he does not want a repeat tonight. It is not about a real performance.