By: Addison Wylie For a comedy about two buds who take their birthday boy pal on the night of his life filled with partying, copious amounts of booze, and flirtatious girls, I expected 21 & Over to be a somewhat obnoxious ride through unsupervised adolescence with some cheap shots that wouldn’t have the film feeling as if it was devoid of all laughs. I’m glad to report that my expectations were wrong. 21 & Over…