In article ,
(Mitchell Gossman) wrote:

Flying one of the kids on an IFR flight plan with decent VMC, she
asked to circle some landmarks in Minneapolis/St. Paul Class B. I
found myself saying "cancel IFR, request clearance to remain in class
B with traffic advisories for some sightseeing". No problem, I
remained on same squawk with the freedom to navigate as I requested.
But would I have been able to remain IFR to circle those landmarks if
I asked, e.g. "Request clearance to circle XYZ at 2500, right turns"
and said nothing about altering the flight plan?

Mitch Gossman

As long as other traffic doesn't conflict, the controller will let you
do anything you want while IFR (subject to terrain clearance and maybe a
few other details).

Since ATC is providing the same kind of separation services to VFR
flights in Class B airspace as they do to IFR flights, the odds are if
he was able to let you do it VFR, he would also have been able to let
you do it IFR.