Venice wants to keep charging an entrance fee for day visitors when a trial period for the charge – the world’s first such scheme – ends this weekend. The city plans to take account of demand in its new pricing and double the fee from €5 ($5.4) to up to €10 when the city on Italy’s Adriatic coast is particularly busy, Michele Zuin, the city councillor responsible for finances, told a local newspaper. The nearly month-long trial put more than than €2 million ($2.1 million) into the city’s coffers. On some days, more than 25,000 paying guests were registered. Zuin, in a story in Il Gazzettino, s…