I like to throw a couple handfuls of thumbtacks down in a circle around me. It also helps teach my partner not to overtravel.
I just put up traffic cones around me and my partner
god this is such an issue in NYC. i can't stand some nights and in particular last night at a year end party, there were times and I was just tired of working on protecting my partner. Girl's might not feel safe, but it's really frustrating as a lead to constantly have to worry about space when all you want to do is focus on the music, the moves you apply to the music and your lovely partner. I got a comment from one advanced follow last night that put me off for the rest of the night, but honestly it was so tight between the wires on the floor, the speakers and the three couples around us that kept on creeping in. Uggh drove me nuts.
At jimmy's tonight the space was just right. Hopefully leading in NYC makes you naturally dance in a small space, but sometimes I feel like my space is getting attacked from all sides. When the floor is like that I just end up going home early and practicing my spins.
My recommendation is to learn to do a 360 swing and the waltz step and add a lot of change of place type moves in your patterns. That helps a lot, but in tighter spots, I'm less prone to leading spins since elbows start flying. Literally last night I didn't have a lot of faith that my partners wouldn't travel or that their spins wouldn't be interrupted, or they wouldn't hurt an incoming scud missile with their elbow.
I'm not good enough to be honest to handle really tough situations, so I sit them out. I think the ability of dancing in a tight spot really comes with experience and general ability to dance small.