I don’t know if beer changes the smell of your sweat, although I do know it changes the smell of your breath. One way or another, it attracts mosquitos:
[researchers had] 43 men in Burkina Faso to drink either a locally brewed beer or tap water. They found that the mosquitoes were more attracted to the beer drinkers than the water drinkers.
From Plos One, via Freakonomics.
Tests need to be made to see if Rum and Coke has the same effect. Or Gin and Tonic (that would be ironic, and poetic!). Or, Soju!