I'm in the process of replacing the carpet in my condo with 9mm stand bamboo.

When I removed the carpet, I found a wood floor that is about 9mm thick, tongue and groove squares. Underneath that is a concrete sub-floor that I cannot nail or screw into (condo rules). The wood floor is glued to the concrete floor, though in some spots it is loose, and in a few others, the wood is missing and was leveled with thinset before the carpet was installed.

I'm planning to float the bamboo floor. I do have floor outlets, so I'm hoping that doesn't pose a problem with buckling. My questions are:

1) Do you agree that floating is the best option for this scenario? I think the wood subfloor is not deep enough to nail into. Gluing is an option, but it doesn't seem worth the extra labor/cost.

2) Do you recommend floor clamps? If so, how many would be necessary at any given time?

3) Is an underlayment with a moisture barrier a good idea? I am on the fourth floor.

What does the manufacturer say bout floating that product?

Floor outlet covers come in all kinds of styles that allow for overlapping the flooring. But you can set it in the wood without it being anchored into the substrate below so it floats with the floor.
Are you on grade....like on the bottom floor and concrete is poured on soil or are on a poured pan?