Why is this happening in Chicago?

Have gas prices reached the pint of no return?:

If gas prices are driving you to drink, here's the place to go: the Handlebar, 2311 W. North.

Under its Inverse Petrol-O-Matic Beer Pricing Scheme, beer prices will fall as gas prices rise.

So with gas at $3, a pint of Goose Island 312 ale is also $3. When gas hits $4, the beer's $2. Five-dollar gas gets you beer for a buck and if gas hits $6 the beer's free.