You should weigh your options, the pros and cons of each choice. You should consider what type of equipment you want and it's cost. Fitness equipment can be quite costly. Fitness centers usually have a variety of top of the line equipment. They may offer assistance on or personal trainer. Some have pools, and offer other things such as classes for yoga or nutrition. The best thing to do is weigh your options versus the cost and where you will benefit the most. In my opinion, a fitness center offers more for less cost.
Location- If a place is too far away, it may be extremely difficult to even keep the motivation to go.
Cleanliness- You DO NOT want to work out in an area that is unsafe or unclean because it speaks volumes about what the rest of the gym staff is like.
Price- You need to be able to afford where you are going to be able to go. A place that is too cheap may not meet your needs and a gym that is too expensive can break the bank if you are not consistent or do not need the extra cost.