Great — here are hotels/hostels in Mumbai known for having shared lounges, common hangout areas or rooftop cafés where it’s easy to meet other guests. I’ve grouped the most social options first (hostels / social stays), then a few boutique hotels with communal lounges.

Hostels & social stays (best for meeting other travellers)

• Zostel Mumbai (Andheri) — branded hostel with a cafe, rooftop/common hangout area and regular activities. (old.zostel.com)
• Hostel Mantra (Andheri) — indoor/outdoor common areas, rooftop chill zone, games and communal kitchen. (hostelmantra.com)
• Hammock Hostels – Bandra — garden/terrace, shared lounge/TV area, shared kitchen, events like pub crawls and live music. (airpaz.com)
• Nap Manor Hostels (Santacruz) — communal living room/library, communal tables and regular activities geared toward meeting people. (napmanorhostels.com)
• Backpacker Cowies / (Backpacker Panda) Colaba — terrace, shared lounge/TV area and communal kitchen in SoBo (close to Gateway of India). (dorms.com)
• Mumbai Staytion Dorm (Andheri) — bright, social dorm with common area, games and TV. (lbbstatic.lbb.in)
• Social Hubz / other airport-area hostels — shared lounge, terrace and common areas (useful if you need to stay near the airport). (booking.com)

Boutique / small hotels with shared lounges (quieter but social)

• Abode Bombay (Colaba) — heritage boutique hotel with a cosy lobby-lounge / communal breakfast table and library — great for meeting other guests in a relaxed setting. (frommers.com)
• The Gordon House Hotel (Colaba) — small stylish hotel with a lounge bar and inviting public spaces. (ghhotel.com)
• Indie Stays (BKC / Santacruz listings) — properties that list a shared lounge / common area on their booking pages (good for travellers who want hotel comforts plus communal space). (booking.com)

Quick tips

• If your main goal is to meet people, book a hostel or “social” hotel (they run events, communal meals and rooftop/TV lounges). Hostels consistently advertise common hangouts and activities. (hostelworld.com)
• Check the property’s booking page or Hostelworld/Booking reviews for recent mentions of events, quiet hours and the size/availability of the common lounge before you book. (Listings change often; confirm current policies on the property page.) (booking.com)

If you’d like, I can:

• Filter options by neighbourhood (Colaba, Bandra, Andheri, near the airport), price range, or travel dates; or
• Pull live availability + links for 3–5 places that match your preferred dates.

Which neighbourhood or budget are you leaning toward?