Just another note about weight...
While the R22 may boast a 240lb seat limit, if you put two 240lb people in your machine, I'd hope the CAA are about to take away any licence you may have.
Unfortunately not only will you have a rather limited fuel load (simple numbers: 890 Empty, 2 x 240 pilots = 1370lbs - the MAUW for the 22); but more importantly will be out of balance longitudinally.
The cabin load limit for forward CofG is around about 370-380lbs for a betaII. This varies with configuration, and the Betas are a little better off.
So, be sure to find a well weighted instructor to go with - and one who will ensure we're all safe, and legal!