When I can get it on tap, Guinness.
In the summertime though I often find lighter beers more thirst-quenching, so when its hot I usually go with Modelo Especial. (among the lighter beers, I usually go for Mexican or Jamaican brews).
When I'm not driving though I'll oftern opt for Jack Daniels and lemonade instead. I wonder why they don't use real lemonade in a "Lynchburg Lemonade"? (...whiskey tastes much better when mixed with real lemonade than with sweet and sour mix, triple sec and Sprite.)
And coca-cola always tastes better with Jack Daniels in it too!
Electrics: Epiphone Les Paul Standard (w/S.D. pups - JB-4/bridge, SH-'59 neck), Fender Fat Strat (Mexican), Squier Fat Tele, Squier '51, Agile Valkyrie III, Ibanez Artcore AF75, Washburn OS OE30 Delta King, Dean Vendetta XM (w/ Dimarzios, D-Sonic/bridge, Air Norton/neck), Silvertone archtop (late 60s/early 70s), Titan EG-1 strat, Gibson G-3 bass, Fullerton strat
Acoustics: Sigma DM-5 (Japanese), Silvertone archtop (early 50s), Yamaha FG-110 (Korean), Alvarez RD20 12 string, Silvertone (60s)
Amps: Alamo Capri (early 60s tube), Alamo Challenger (late 60s tube) Epiphone Valve Jr. Head (w/Peavey 1x10 cab & Realistic 2x6 cab), Fender Yale Reverb, Vox Pathfinder 15R, Marshall Lead 12, Behringer G110 V-Tone, Marshall MG15CD, Vox DA-5, Pignose 7-100, Marshall Bass 12