The Congress Avenue Marriott -- a 1,000 room hotel complex on 2nd and Congress avenue -- is the most controversial, and one of the least popular downtown projects. The project is best known for displacing Las Manitas and other local businesses. While the full details of the current plan are not known, the last two versions of the project were criticized for bland institutional architecture and a lack of ground-floor retail on a key block connecting the convention center area to the second street district.The Congress Avenue Marriott, V. 1.0The original plan for . . .