Tue 12 Aug- Prague sightseeing, Vivaldi concert

Tue 12 Aug- after the buffet breakfast, we went for Stan's PT/INR test. Once again, it was much easier than expected. The hotel concierge found the nearest hospital that could do the test. It was a short walk along the river, then a little bit of administrative check in, a short wait, then the test and about a half hour later, we received the results. Cost was about $30.
After the test, we walked on to the old town, and had lunch at the Kolkovna restaurant. Stan had spicy marinated wurst roasted in dark beer on an iron skillet; Kiyomi had spicy marinated sausage. We ate half, then switched plates. We could not finish all the food; and we each had 1/2 liter Pilsner Urquell with lunch (which we did finish), then an espresso-male afterward. Total was 376 Kc (Czech crowns, E16, or about $25). The two 1/2 liter (pint) beer was 78 Kc, the espressos 96 Kc.
We walked over to Charles Bridge, and across it. It's pedestrian only; but it's lined with artists doing portraits, caricatures, and selling their artwork featuring Prague sites and scenery. Also musicians were entertaining the constant stream of walkers (probably all tourists).
We were intrigued by a concert at the Church of St. Salvator, featuring a string quartet playing Mozart's 'Ave Verum', Pachelbel's 'Canon', Bach's 'Air', two 'Ave Maria' versions, Bach-Gounod's and Schubert's, some other music by Handel and Mozart, and then Vivaldi's 'Spring' and 'Summer'. Our cost was 700 Kc, about $40. After the concert we walked back to the Hotel.
The GPS came in handy several times during the day, getting us where we wanted to go through the winding streets.