i smoke in my room a lot wihtout any smell, all you need is a small fan, the 1 i use is about a foot in diamiter and i just open my window, put the fan on high, and set it on the window sill. the only thing you gotta remember is to keep the bowl close enough to the fan when ur done taking your hit so that the smoke that streams off the ember gets sucked out the window while you exhale. this basically eliminates any kind of strong CHRONIC odor. also make sure there is no way the smoke could possibly blow back in the window(its happened to me). use cologne for extra assurance if u feel nessasary.

peace