The World Cup  runs June 12-July 13. Will the US make it out of its group? Will Cristiano Ronaldo get past the (alleged) curse  upon his injured knee? Will Neymar Jr.  debut a new hairstyle in front of the Brazilian home crowd? And where will you go to watch all this happen? Some suggestions below.
1) SoMa StrEat Food Park: international array of food trucks, beer garden (with Brazilian beer specials), "lots of big-screen HDTVs." www.somastreatfoodpark.com 
2) For those who prefer to party indoors, with a full bar, club Monarch is going to be broadcasting all the games. (OK, "all the big matches" — so if your chosen side is too far down in the FIFA rankings you might be out of luck). www.monarchsf.com 
3) North Beach's Cigar Bar hosts a screening of Sat/14's key clashes (i.e., you're on your own for the early-AM Greece vs. Colombia game) with DJs spinning special World Cup jams. This weekend also happens to be the North Beach Festival, so you can get your street fair on before the games. www.aykuteevents.com 
4) Once again, there'll be a giant screen outside of SF City Hall broadcasting most of the games. Also: food trucks, soccer skills clinics, mini-games, and other kid-friendly activities. www.worldcupsf.com 
5) In the Metreon, Jillian's will be screening all the games, with full bar and special menus. www.jillianssf.com 
Celebrate the whole shebang with an opening party (samba dancers!) Sat/14 at Supperclub (www.supperclub.com ). Also in SF, don't forget futbol standbys Mad Dog in the Fog, Danny Coyle's, Ireland’s 32, Kate O’Brien’s, and Balompie Café.