If you can make it during the day, I would pack a picnic and try some of your local car parks/picnic sites. OK, you get the dog walkers and families out, so you have to be more discreet, but its less scary than after dark, and if you keep a lookout you may find some appeciative eyes coming in your direction.
If you want a mature male watcher, I would also be happy to oblige in a pre-arranged meeting. Good luck.