You know, there's really no such thing as a bad happy hour. Any working stiff who knows the agony of counting down the seconds till that 5 o'clock whistle blows can tell you that. A drink special's a drink special, right? But some happy hours are better than others, and one is the best. Happy hour at Blue Mesa Grill in the Lincoln Park Shopping Center goes above and beyond the typical happy-hour offerings. From 4 p.m. to 7 p.m. Monday through Friday, bar patrons can partake of complimentary quesadillas as well as chips and salsa. And besides the usual tortilla chips many restaurants offer, Blue Mesa's signature sweet potato chips are also available--and with two kinds of salsa, too. But don't forget the drink specials. After working up a thirst at the quesadilla bar, mosey on over to that other bar and take advantage of reduced prices on bottled beer and margaritas from 4 p.m. to 8 p.m. Blue Mesa's house margarita is a tasty blue concoction that could wash away any workplace blues.