Although mainstream US beer is widely accepted as shite (by me) these folks do tend to drink it in large glasses. The 16 oz (US fluid ounce), more commonly known as a pint back home, is the smallest glass you can order. The 22 oz is standard. If you want larger than that you ask for a pitcher.
They look at you strange if you ask for a jug. Wouldn’t recommend asking for two. At least not to a female – something is lost in the translation. 😉
Of the typical tap beers you find around here I’d suggest going for a Yuengling. It’s actually quite drinkable! Dear god, whatever you do don’t succumb and order any kind of Millers or Budweiser. Terrible. Though at least it explains the colloquial use of piss to refer to alcohol…some Aussie must have been over here and tasted a Bud!