So, we recently acquired something to this nature:
http://www.basspro.com/Screen-Room-for-Bass-Pro-Shops-Straight-Leg-Canopies/product/1401210916362/
with a mesh screen around it.
We have it set up in our backyard, 3/4 sides on our porch slab. So, the side that is off, we can stake down, and keep the flap secure.

However, the parts that are on the slab can not be staked, so there is a small gap when the wind blows. Any ideas on how to keep it weighed down?
We were thinking some kind of tube sandbag idea, like
http://www.sandbagstore.com/standard-sandbags--tube-sandbags.html.
But, not that expensive hopefully (the damn canopy only came to be like 150$...)

Any ideas JSP?

Some kind of weighted tube that won't roll around seems good, anything else would be more permanent and wouldn't allow you to disassemble the tent without damaging it.

Yeah. and thats the issue, is living on base, they would get bent out of shape if i sunk some screws into their slab..