We’re driving to Henley-on-Thames. What is there to do indoors that’s fun and more adult. We don’t have kids. Thanks!
Do a boat trip if, as expected, the rain stops soon. Last one-hour cruise departs 15:45 from Hobbs's pier.
Get out and enjoy the light (very) rain, walk by the river - after nearly 2 months of almost continuous high temperatures its a pleasure to smell the fresh air and countryside. Far more 'fun' than being stuck indoors
what were you planning to do if it wasn't raining? Whatever it was, put a coat on and still do it!