All beer goes with pork, so I'd just buy whatever the crowd likes. Some people only drink lighter beers, such as Coors and Coors Light, MGD, Bud, etc.
However, if your crowd is like me and many of my friends, who like tasting various microbrews, you can get a lot of wildly different microbeers for people to try, everything from beers with fruit mixed in (i.e., an Apricot Ale) to Belgium White beers such as Blue Moon (which isn't bitter but has spices in it such as coriander and kind of a hint of what I describe as a "banana" taste), to Porters, which to me are very heavy and have a coffee taste, as MainelyDave pointed out.
So if you think your partygoers are adventuresome, buy a bunch of different six packs of various microbeers, and as they try them all, the various beers and tastes will be the talk of the party (besides the fine-tasting pork, of course
).
If they are not that adventuresome, maybe get some "lighter tasting" microbeers (even though these brands are mass produced now) in addition to your Coors Light. These would be like Sam Adams, Michelob Amber Ale, Killian's Red, and I'm not sure if you have Leinenkugel's in Philly, but if you do, they make a lot of cool, different, lighter-tasting microbeers such as: Northwoods Lager (probably don't have that in Philly), Big Butt (that leaves the door open to many jokes for the person who drinks this brand), Honey Weis (a really light beer with honey in it ... very nice for hot weather), and Berry Weis (very sweet, almost like half beer, half berry wine ... but popular with the ladies).
We were at a graduation party in June, and the different Leinenkugel's brands were the most popular with the crowd and they were the first to run out.
On another note for all you beer lovers out there, if you have friends who like to try different beers, try this at your next party: Call it a Microbrew Party, and tell everyone who comes and who wants to participate, to bring a six pack of any microbeer or unique beer (no Bud or MGD or any other mainstream beer) to add to the "community cooler." And if they get a brand that they've never tasted before, that's all the better.
So everyone donates a six pack of microbrew "to the cause," and then they can drink that beer or any of the various kinds of beer they find in the cooler. It's a great way for people to try all kinds of different beers, its a fun theme for a party, and then you can feed 'em with some smoked pulled pork or brisket, and between the food and beer, people will talk about it for years to come.
OK, gotta go ... this posting is way too long, and I'm getting thirsty and hungry
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