If you want to start a race war, rooting for South Africa tomorrow at 7am in the Mission is probably the most effective way to make that happen. But if you just want to get drunk, watch an event as rare as a leap year and join in some global brotherhood, fill that flask full of tequila and/or strawberry smoothies (Cape Town has the most wonderful strawberry smoothies) and slosh around the Mission. Chavitas #2 on 24th is probably a solid bet for continuing your thursday night bender/starting your bar crawl. It's the best unpretentious breakfast place in the Mission, has plenty of beer to compliment your free chips and salsa and has a nice tube of a television. Considering this place is always dead when I go there, I have no idea if it will actually be packed or not, but whatever. The food is awesome and there is beer.
From there, you should ditch your weapons on the curb and head to El Trebol on 22nd and Capp. The security guard will feel you up, which may tickle but deal with it, and you can order a bucket of Corona for PBR prices while getting hustled at pool. Best of all is that you can urinate/puke/shit on my stoop afterwards. It's a win-win for everybody.
Or you can just read Mission Loc@l and find out where you can rail lines while “watching” soccer. I kid. Delirium sounds like a great soccer venue.