There was no Taylor Swift, but the Democratic National Convention and other high-profile events helped boost Chicago hotels to record revenue this summer. Visitors to Chicago booked 3.4 million hotel rooms from June through August, up 5% over last summer, according to data released Tuesday by Choose Chicago, the city’s tourism arm. The increased demand generated $942 million in revenue for Chicago hotels and $53 million in city tax revenue, both up 13% over last summer to all-time highs, according to Choose Chicago. The DNC, which ran from Aug 19 to 22 at the United Center, drew 15,000 journalists and 5,000 delegates to the city to cover the historic nomination of Vice President Kamala Harris.