Crowne Plaza better located than Holiday Inn Express.
Hindley St is not an ideal place to spend on a weekend.
Fights, stabbings, beggars, pesterers...
Unless you know self defence or can run...
Its like a mini Kings X.
Stamford Plaza has been a covid hotel, Stamford Grand at Glenelg is the one to go for, on the beach, reachable by tram.
You can get a visitors pass for 3 days, (now $25.50 for 3 days), for all busses, tram and trains you want.
Can buy it from one of the outlets at Adelaide Airport, WH Smith, the one inside the terminal.
The Watson is out of the city, at Walkerville, so you would need a bus or uber.
I know the Rockford is in ALL Accor, and if you want, you can get QFF points and ALL points in that.
I loved the Sofitel, very good, $$$$$ yes, but it has not been a covid quarantine place.
Hilton is good too, right next to Central Market and "Chinatown" for food, there is a Coles downstairs too.
Bit dated as its about 25 or more years old, but has been refreshed.
Crowne Plaza would be my first choice, haven't stayed there, but it has not been a covid quarantine hotel either, not flash, but its away from the night fights.
If you want, Airbnb at Glenelg might be ok, North Glenelg, the beach is walkable, you can walk the Esplanade quite far.
Not as Oooo as Coogee, or Manly, but nice!
Double edit:
The Stamford Plaza guard desk out the front is now unattended some days, the hordings out the front still push people to go to the Stamford Grand.
Guess the Stamford Plaza is still no go.
See if they are accepting bookings on google for Jun.
www.adelaidemetro.com.au is the place to look at for public transport in Adelaide.
Adelaide bus drivers are not accepting cash, so you would have to buy tickets off board from agents, $10.xx for a day trip from a newsagent, but if you are happy with Uber, that one is better.
Uber cars in Adelaide have a small blue triangle on the pax front wind shield, so you know an Uber when you see that.
Holiday Inn Express check in is on the 4th floor, and you have to walk from Hindley St, into hotel.
Go Crowne Plaza, safer on a Fri night.