Bay seniors who think that life east of the Caldecott Tunnel is nothing but the gated geriatrics at Rossmore will be happily surprised to find the Bedford Gallery at the Lesher Center of the Arts in Walnut Creek. Their current show. “Blow Up” is another wow, eight inflatable sculptures from cars to the coppery reclining god shown here. It runs through June 21. If you’re interested in exploring the over-the-hill art scene check out Contra Costa Open Studios on May 16 and 17.