But, I don't appear to have a very strong (if any) gravitational field.
You were right until you said "if any". You have a ridiculously tiny gravitational field. Like, let's pull some numbers out of my arse and say you're a trillionth of the mass of the earth. One trillion of you = one earth. We'll also assume one trillion of you is exactly as dense as one earth to stop mojo nitpicking my dumb analogy. So, your personal gravity is one trillionth that of earth.

Large bendy things (palm trees for example) don't seem to bend towards each other either,
That's because local influences, such as wind, play a much more significant role. And by much, I mean a shit load of zeroes.

But, if this is the case, do objects in space tend to clump together? For example, on a trip to the moon (or mars), would free floating objects tend to group together?
I reckon I can answer this too. Where there's no other influences at work (a huge ask), sure, two items freely floating in space will slowly be drawn to one another, not necessarily in direct collision, more like stable orbits. But we're probably talking astronomical amounts of time for tiny objects, and even slight influences like a comet a million miles away would probably disrupt the gravitational harmony.

Also, what are the lotto numbers.
They are a randomly selected group of numbers that could win you millions of dollars.