STAFF PICK: It may be as anachronistic as Gregorian chant performed by a choir of medieval monks, but the Friday night fish fry is still a custom in some parts of this country. Tucson has several places that serve up a hearty meal at a low price on the last workday of the week; our favorite out east is the Hideout Saloon. For only $5.75 you get an "all you can eat" meal of at least two huge and tasty pieces of fried white pollack, French fries and coleslaw. Numerous beers are on tap and served in icy cold glasses to complement your dinner. The atmosphere is simple: a long bar with big-screen TV, a couple of pool tables and many tables at which to sit. We think the chanting monks would like this place.