If you can secure the evening of a local in your destination town, you can get quite an amazing tour of the area and see things that tourists may never find. It isn’t that hard to invite a local to be your guide. If you have expense account money, you can arrange to buy your guide dinner. They get a good meal for free, and you get a guided tour of the area. But don’t be afraid to be a tourist if you are in a great city and you want to see the big sites. It can be a fine memory of your visit to the town, and after all, you’ve worked hard on your business objectives so you are entitled to some relaxation. If you are there on Friday, but your work must be continued on Monday, most businesses would rather pay for two nights in a hotel and meals than fly you home and back out again. So you can keep your rental car and simply put aside your business for a while and really explore the local haunts.