t is very common in hoodoo to have an altar in the bedroom, often on the top of the bureau drawer or nightstand. I have never heard any conjure practitioner speak a negative word against this practice. There are other religio-magical systems in which this is forbidden, but they are traditions from other cultures, and thus not relevant to African American hoodoo per se.
Here is my own bedroom altar set up on an old treadle sewing machine:

Another common place for an altar in hoodoo is in the living room, where photos of ancestors and distant family may be displayed, candles burned, and vases of flowers placed decoratively and with magical intent. As with the subject of altars in the bedroom, you may hear people from other religio-magical cultures say that it is "wrong" to put pictures of the dead and the living on the same altar, but that belief is not found in conjure, and should best be understood as the opinion of people who come out of and are practicing a different path or tradition.
I mention these things because sometimes newcomers to rootwork who follow a non-Christian religion in which such restrictions apply try to bring their own religion's rules into hoodoo, along with a measure of frowning disapproval for how we work. The truth is, such intrusions are irrelevant at best and impolite at worst, and when it comes to conjure altars, there are many methods and styles of work, and very few hoodoo practitioners will pay attention to outsiders' lists of "thou shalt nots."