In Gangnam, go to Olive Young Central Gangnam Town (403 Gangnam-daero, B1–4F) or Gangnam Town (429 Gangnam-daero, 1F–3F), near Gangnam Station on Line 2, open until 10:30pm. Short on time? The in-shower hair removal cream, 200ml, goes on in the shower and rinses off. At 200ml, check it in. You can still shop after work.