Il BISTRO 93-A Pike Street (in Post Alley), 682-3049 For those of the swankier inclination, Il Bistro, which is located smack downtown in Post Alley (next to the Pike Place Market, in case you didn't know), is the perfect place for evening cocktails. They serve dinner as well, though I've never partaken. I prefer my juice joints to be just that--filled with juice. Why is Il Bistro so swank? The décor, certainly, but there is something else, and that something is this: the bartenders. They are of a rare breed--knowledgeable, patient, and superduper smooth--and their presence makes for a decidedly posh boozing environment. BRADLEY STEINBACHER