If you feel like your missing out change your patterns.

When I am at a new airport lounge access or not I will make a point to walk the concourses that are connected post security. In some smaller airports this may only take 5 minutes end to end, but at least I did a little extra walking before I end up stuck sitting on a plane. At larger airports this can also be interesting for example at a place like IST its interesting to walk past a boarding gate for an Iraqi Airways flight to Baghdad, or the TK flight to Somalia. In PTY to see people flying back into Valenzuela with everything going on there right now. At a place like ORD where so many terminals and concourses are connected this can really eat up a layover. I spend enough time in Admirals Clubs taking a walk from the L concourse to the B concourse at ORD is always a nice way to break up a layover.

Your lounge access doesn't get revoked if you don't head straight there post security. Take a moment to wander through the terminal and then head to the lounge, or leave the lounge before they make your boarding announcement so you have some extra time to see more of the airport.