You can watch classic films while supping cocktails beside the Thames in Brentford this weekend.

Open-air screenings of Grease, Some Like It Hot and The Grand Budapest Hotel will take place during Watermans' The River Weekender, which is part of the Totally Thames Festival.

A children's treasure hunt with Old Father Thames, a whale with a mini-theatre in its belly and a video installation inspired by crossings along the Thames are among other highlights at the riverside arts venue during the weekend.

* A Treasure Hunt with Old Father Thames, for children aged two to eight, is on Saturday and Sunday, with four performances each day. Participants can hear tales from a master storyteller, learn a dance and hunt for the Goddess Isis, who protected the river for hundreds of years. Tickets cost £5 per child.

* Free activities in the gallery include a private view of work produced during the Urban Ambush youth arts festival and the video installation Crossings.

* The Family Cinema strand continues on Sat 20 & Sun 21 September at 11 am continues with The Jungle Book and The Goonies.

* Adult cinema-goers can watch films as the sun sets on the riverside terrace each evening between Friday and Sunday, with a free cocktail or mocktail included in the ticket price.

For more details and to book tickets, call the box office on 020 8232 1010 or visit www.watermans.org.uk

The belly of this whale will be turned into a mini-theatre for The River Weekender at Watermans in Brentford
Tea dance for Little People, who are running a treasure hunt for young children at Watermans in Brentford