Fuller Seminary (#), Sheraton Pasadena Hotel, Courtyard by Marriott Pasadena Old Town, Vagabond Inn Executive Pasadena (*) and Pasadena Inn (aka Greetree Pasadena Inn). Usually Saga Motel provides the best value for money and if you wish to rent an apartment and share then perhpas the Fuller Seminary also provides an excellent deal.
(#) may have a special deal if identified as a Carnegie visitor. (*) may have a special deal if identified as a Caltech visitor.