Well, If you go to Circus Circus and get one of their pink fanny packs...
You blend right in here in Las Vegas.
Other times you may want to wear an IWB holster (buy your britches an inch or two larger) with a vest (not a photographers vest... too obvious) or a sports coat/overshirt, Hawaiian shirt, golf shirt for cover.
After a while you don't even think about it, you just dress that way automatically.
I've also got a heavy leather vest from Coronado with built in pockets for carry.
One of the "belly bands" can be used. I've got one in black and one in white. Uncomfortable at first. Does tend to keep the "gut" tightened up and the ladies just love the svelte look (LOL)
When I carry/wear the black fanny pack, it tends to go over one shoulder with the bag hanging under the arm, but it's not real quick to access, so you've got to be in a Condition Yellow and pre-think your draw while looking for cover. (Sound too paranoid yet?)
There's always the notebook/planner carry device. But you can misplace one of those if your wits aren't about you at all times.
Then again, some like a smaller weapon (mouse gun anyone?) in a pocket holster stuck in a front pocket or in a coat pocket.
Thunderwear? For some. Not moi.
When you're on the beach and wearing your speedo's... you're on your own. Can't help ya there.
Your choices are many. Hope that helped.
Adios