Café Slavia
Overlooking the river and next to the National Theater, this old-school continental European-style café is one of a clutch in Prague where you can imagine playwright-turned-independence hero Václav Havel holding court or composer Bedřich Smetana winding down after a performance. Actually, you're not just imagining it: all sorts of Czech artistic luminaries have supped here, including the above, and Havel liked it so much he even lobbied for it to reopen when it closed for reconstruction in the 1990s. It's old-school, so beer is perfectly acceptable at almost any time of day.