Suggestions:
Marriott Leicester - big and anonymous, but think has barriered car park.
Ibis - Coventry South - rooms a walk from reception, no parking restrictions. See two WGs there.
Mill on the Soar - on B4114, s/w Leicester. Rooms and reception separate, easy in and out (the hotel).
Leicester city centre - Holiday Inn may be an option, and Ramada encore - been there for a session, and no issues.
Nuneaton - Long Shoot - bit downmarket, but rooms separate and used by a local WG for gangbangs.
Final option may be Hinckley Island hotel, right by M69.
Ladies ? Dont punt locally, and WGs at Ibis were touring...