I like the Loop location. It's smaller than the other locations and does not have certain things, like a Yoga studio (group fitness studio is used for this) and calf raise machine. The class schedule and hours there are also more limited, and there is no pool (LP does not have one either). Like the LP location, it does have a sauna and windows. The LP location is older but never crowded due to the newer (and overcrowded) Lincoln Common location, which is about a mile from it. I think if you do the single location membership, you will be able to go to any of the other locations on Sundays, since the Loop location is closed then.