There are many options. For example, if it’s in a business centre, then there's a high likelihood that people will drop by the bar after work. A building with preexisting bars, restaurants or clubs is just as suitable for a new bar: if neighbouring locations are in demand, yours will be, too.
Another option is to choose a location in an apartment building, although you will then have to closely monitor loud music and people smoking on the street. Residents will certainly express their discontent, and might even write a complaint. By the way, if you open a bar in an apartment building, be prepared for latecomers.
It doesn't matter if the building you choose is new or old; the main thing is that it's in good condition. Thoroughly inspect the ceilings, walls and pipes when targeting. Nothing should pour in or leak. It’s easy to notice when a building is in bad condition with a close inspection.