Check out this great item that I found online.
2 nights in a superior double room at the Grandior Hotel Prague with full buffet breakfast.
Voucher has no cash value. Subject to availability; n/a during special events, city wide events, or congresses, i.e. New Years Eve period, Easter Holiday, 26-30 May EFFORT Congress, 22 June - 2 July IUGG Congress, 16-21 August Goldschmidt Conference; Exp. 25th March 2016
"2 Nights in Prague at the Grandior"