Making a 3d effect image from 2 photos.

| He has 2 bars. I thought about taking a photo of each bar with the same
| staff stood behind them and creating some sort of 3d effect picture from
| them, sort of creating the image of a pub with a bar each side.


I wonder if you might be misusing "3-D". You're
not likely to get a photo that looks like it has that
kind of depth. Maybe you meant something more
like a 360 degree view? My best guess would be
to take two shots at an angle and put them together
so that the far end of the bar is "heading toward infinity".
Imagine a house drawn with 4 lines -- 2 walls and two
lines for a high, sharply peaked roof. The two roof lines
are the bars. The two wall lines indicate the angle of
the shot. In other words, shoot one bar from an angle,
looking down the bar. Do the same with the other, but
from the opposite end. Putting them together you could
create a dual bar that disappears at a vanishing point.