Here are several Melbourne hotels and budget options that are especially convenient for solo travellers because they’re close to major train/tram hubs, have 24‑hour reception or social spaces, and sit inside (or close to) the CBD Free Tram Zone.

Luxury / Upscale

• The Langham, Southbank — riverside Southbank location, about a 5–7 minute walk to Flinders Street Station (easy tram/walk access to the CBD). Good for solo travellers who want a quieter riverside base with concierge help for trips and bookings. (langhamhotels.com)
• W Melbourne (Collins Arch) — central Collins/Flinders Lane location, within easy walking distance of Southern Cross and Flinders St; 24‑hour front desk and concierge services make arrivals/departures simple. (marriott.com)

Mid‑range (central + easy transport)

• Novotel Melbourne on Collins (Collins St, CBD) — on Collins Street in the Free Tram Zone, a short walk to many tram stops and central attractions (good balance of price, services and location). (novotelmelbourne.com.au)
• Adina Apartment Hotel (Flinders St / Southbank options) — apartment‑style rooms in the CBD/Southbank with easy walking/tram access to Flinders St, Southern Cross and the Free Tram Zone (good if you want kitchenette and longer stays). (adinahotels.com)

Budget / Solo‑friendly / Social

• YHA Melbourne Central (Melbourne Central / Flinders St area) — hostel with private rooms available, 24‑hour reception, lockers and social spaces (great for solo travellers who want to meet people or keep costs down). Located near tram stops and the City Circle/metro stations. (yha.com.au)
• Space Hotel (Russell St / Melbourne CBD) — hybrid hostel/hotel with private rooms and dorms, social areas (rooftop, bar, cinema), 24/7 reception and ~5‑minute walk to Melbourne Central station. Good choice if you want social facilities plus easy tram/train links. (spacehotel.com.au)

Great for airport / regional rail connections

• Crowne Plaza Melbourne (Spencer St / riverfront) — close to Southern Cross Station (major hub for metropolitan, regional and SkyBus airport coaches), convenient for arrivals/departures and regional day trips. (melbourne.crowneplaza.com)

Transport context & quick tips

• Melbourne’s Free Tram Zone covers the CBD and Docklands, so many CBD hotels let you hop on/off trams without a myki if your trip is entirely inside the zone. This makes moving around the CBD easy for solo travellers. (ptv.vic.gov.au)
• The Night Network runs late‑night weekend trains, trams and buses—useful if you’re out late (check exact lines/times for your hotel location). (ptv.vic.gov.au)
• Southern Cross Station is the city’s main transport hub (regional trains, SkyBus airport coaches, major tram/bus links)—staying near it makes airport transfers and day trips simpler. (transport.vic.gov.au)

If you tell me your preferred neighbourhood (CBD / Southbank / St Kilda / Docklands), budget or exact travel dates I can:

• narrow this to 3–4 best choices for your needs, and
• check current rates/availability and proximity maps.

Would you like me to filter by budget, neighbourhood, or dates?