The Czech capital of Prague plans to ban guided pub crawls after nightfall in a bid to crack down on loud, drunken tourists who crowd the popular holiday destination, the city has announced. The pub crawls are particularly popular with tourists from the United States and the United Kingdom, and usually involve visiting a series of bars across the city for a fixed fee and led by a tour guide. The municipal regulation will come into force at the beginning of November, and will apply from 10pm until 6am. Prague officials contended the boozy tours have a negative impact on public spaces and have b…