Suit and tie guy here.
Pocket carried for a few years. Problem is that suit pants pockets can be shallow, and with no coat on, someone behind you can see your gun. Almost impossible to draw with you support hand. Takes up a pocket, so what to do with all the other stuff? Limits you to a small gun, and small guns can be unreliable.
Tried the holster t-shirt, which puts the gun under the arm, like the holster previously suggested. I consider that more of a way of transporting a gun, and not a true holster - draw is very, very slow. Try it one handed - almost impossible. Got made by a family friend (hug) - would have been a disaster had it happened at work!
Ankle holster? No way. You can't draw and move at the same time. Good for a BUG, not for a primary.
Tried IWB - looked like I grew a tumor. Would have required a whole new wardrobe of bigger suit pants. Too much money!
Smartcarry! Eureka! I carried my G19 and a spare mag for 18 months undetected. I now carry a G26 - slightly less of a bulge, not that anyone noticed. I wear it at 11 o'clock, with the bottom of the G26's grip centered on the pants zipper.
Draw is quick - no need to untuck or sweep any cover garments away. No need to reach around to your hip. (DO NOT listen to the naysayers who have never used it!) Very comfortable - when you sit, the pistol lays on your left thigh. Wear pleated suit pants, especially in darker colors, and no one will detect anything.
You can draw one handed - even with your support hand (turn it palm out and draw). Important if one hand is injured or involved in a struggle.
Bonus - carries a spare mag, and has its own belt - so won't drag your pants down. No worries dropping your gun in the toilet, either.
You get the idea - try it out. Charlie will refund your money if you don't like it (minus shipping).
More on my holster journey -
Good luck - hope this helps.