E20 or E-20 may be:
R&R is a fictional nightclub in the BBC soap opera, EastEnders, located at the fictional address of 4 Turpin Road. Over the years, it has had several different owners and names. It has also been called The Cobra Club, The Market Cellar, e20, Angie's Den, Scarlet, and the current R&R.
The club is opened in 1996 and named Cobra Club. It is owned by George Palmer, who employs Huw Edwards and Lenny Wallace as barmen. It closes after being raided by the police in 1997, but reopens later that year as the Market Cellar. The club is actually used to facilitate George's money-laundering operations and illegal gambling. Later George's daughter Annie Palmer takes over the running of the club and also starts a loan shark business from inside the club with Phil Mitchell and Conor Flaherty.