Below is a selection of hotels in the vicinity of the Royal College of Physicians on Queen Street, to suit a range of budgets.
The Principal Hotel, George Street (this is where the speakers are staying) https://www.phcompany.com/principal/edinburgh-george-street/
It has a sister hotel in Charlotte Square which about a mile away.
Edinburgh Grand, St Andrew’s Square (where buses from airport terminate) http://www.chrisstewartgroup.com/serviced-apartments-in-edinburgh/the-edinburgh-grand-st-andrew-square-edinburgh/
Mercure, Princes Street
Hotel Ibis, St Andrew’s Square
Destiny Scotland, Queen Street
Spires Apartments, Hanover Street
Premier Inn, York Place
Fountain Court Apartments, Queen Street
Royal Scots Club, Abercromby Place
Motel One, Princes Street
Travelodge, Queen Street