Danny Newman usually buys a property and leaves it be. This time around, he’s starting something new. The 42-year-old tech entrepreneur is known for preserving unique buildings and buying beloved Denver businesses, like 150-year-old My Brother’s Bar and the Mercury Cafe. But at 4200 W. Colfax Ave., in a former tire shop, he’s launching a new concept: Full Tank Food Park. Newman — who also owns the top of the downtown clocktower — said the business on Colfax, which will open next week, is a mashup of a traditional neighborhood coffee shop and a food truck park.