We are not getting a block of hotel rooms for the event due to individual tastes and budget.
Plus, generally the hotel rates for a group is usually a little better or the same as the rates you can find on travel sites like Hotels.com, Expedia.com, Travelzoo.com, or AAA.
Some hotels close to Madame Tussauds Hollywood are (in order of proximity):
1) Hotel Roosevelt – Historic and legendary hotel rich in Hollywood history. A hangout for young Hollywood today and allegedly haunted by Marilyn Monroe, Errol Flynn, and Montgomery Clift. Walking distance to Madame Tussauds Hollywood.
2) W Hotel Hollywood – Modern luxury hotel.
3) Lowes Hollywood Hotel – Modern luxury hotel.