First time accepted submitter AmyVernon writes with a small hack that "is supposed to boost signal strength by at least 2 to 4 bars," and which requires little more than a can of beer
(or Orangina). She writes: "What you need: scissors, a utility knife, some adhesive putty and an empty beer can. The brand doesn't matter for the router, but I suppose it would be cooler looking if it were Asahi or Stella Artois than if it were Budweiser."
Perhaps this will be added one day to my favorite (and very extensive!) list of low-budget Wi-Fi amplifying rigs