Generation after generation of sandwich lovers stroll through the aisles of this market-cum-sandwich emporium, pausing to rap with neighbors and non-neighbors — most of whom are headed for the deli case, filled with cold cuts and cheeses, salads and spreads, olives and roasted peppers, shells and sauce. During the lunch rush, Spinelli's Market is busier than a free day at the zoo, and the countermen, seasoned professionals who prefer that you order with rapidity, don't waste any time assembling your order. But with nearly two dozen choices on the board, selecting a sandwich can be beyond daunting. Fortunately, it doesn't really matter which way you roll: Everything — from the Reuben stacked with corned beef, lacy Swiss and sauerkraut to the hot Italian roast beef — is the stuff of daydreams.