A sports club boss says a £400,000 revamp of facilities is a “do or die” attempt to attract new members. Frindsbury Lawn Tennis Club has seen its membership halve in the last seven years, leading to concerns for its future viability. Chairman Darren Marshall says the business, which is near Upnor in Medway, has faced fierce competition from rival Avenue Tennis in Gillingham. Now in a move to attract new people, the club is set to tear up its grass courts to make way for padel tennis. This is a form of the game originating in Mexico in the 1960s which was then brought to Spain in the 1970s and …