Tender steak is made somehow more delicious by a simple but flavorful blue cheese sauce. White wine vinegar adds tart flavor and sour cream adds extra creaminess for a memorable meal. Lean boneless strip steaks (also called club steaks) are used here, but other steaks such as tenderloin or sirloin can be substituted. The gorgonzola sauce can be made ahead and stored airtight in the refrigerator for up to 3 days. Bring it to room temperature before serving. You can fry the steaks or grill them. This is an excellent entree for a romantic dinner or small celebration, but it is also easy enough to do any night you are in the mood for steak.