There are a number of hotels nearby The Imagination Gallery, here are a few options:

Jurys Great Russell Street
16-22 Great Russell Street
London
WC1B 3NN
Tel: 020 7347 1000
Fax: 020 7347 1001
http://londonhotels.jurysdoyle.com/greatrussell_london

Radisson Edwardian Kenilworth Hotel
Great Russell Street
London
WC1B 3BL
Tel: + 44 (0)20 7637 3477
Fax: + 44 (0)20 7631 3133

myhotel Bloomsbury
11-13 Bayley Street
Bedford Square
London
WC1B 3HD
Tel:  020 7667 6000
Fax: 020 7667 6044
http://www.myhotels.com