The Wan Chai hotel rooftop with the glass-bottom pool overhead and the skyline behind it.
Z-29 sits on the 29th floor of the Hotel Indigo Hong Kong Island on Queen's Road East, the Wan Chai stretch that connects Admiralty to Causeway Bay. The signature feature is the glass-bottom infinity pool that runs out over the building's edge; the rooftop bar wraps around its base, so the photograph the hotel uses everywhere is real, not staged. Hotel Indigo's own outlet page lists the 16:00 opening and the 22:30 pool-deck cutoff that gets repeated as a complaint on Tripadvisor when guests show up at 23:00 expecting the deck.
The right visitor wants a sunset hour with a Hendrick's-and-tonic, a wedge of Wan Chai skyline behind them, and a photograph of the underside of the pool. The wrong visitor wants a serious cocktail bar — the programme is competent but built around gin pours and signature longs, not a contemporary mixology card — or a quiet late-night drink, because the lift queue from 19:00 to 21:00 weekends is the real friction.
Two zones — the indoor lounge with leather banquettes and a long bar on the south face, and the open pool deck with high tops, daybeds and a satellite bar under the glass-bottom pool. Time Out Hong Kong's rooftop round-up flags the indoor bar as the underused move for rainy nights; Tripadvisor reviews note the deck's western edge as the photograph corner.
Order the house Gin & Tonic (HK$160) with the seasonal botanical tin — the recurring photo-review order across the top 30 Google Maps reviews. The Z-29 Sour (HK$185) is the named house cocktail. Sparkling by the glass at HK$140 holds up as the easy second round.
Skip the contemporary cocktails on the back of the menu — Hong Kong Tatler's rooftop review notes the gin and the longs as the programme's edge and the contemporary card as the weak spot. The snacks plates (HK$120–180) are competent rooftop food, not a destination kitchen.
Through 18:30 the deck reads as in-house hotel guests and after-work Admiralty professionals walking up from the MTR. From 19:00 a dressed-up local Hong Kong Island crowd takes the pool deck for photographs and sunset hour; the room shifts to date night and small groups by 21:00. Tatler's rooftop guide describes the 19:00–20:30 window as 'the photograph hour' and the post-22:30 wind-down as the moment to ask for the indoor banquette.