To help solve the problem, rampART is offering overnight accommodation for people attending the assembly and there will be music and perhaps films after the assembly so nobody should get too bored is they hang about.
Thousands of station staff are involved in the dispute
A Tube strike looks certain to go ahead on Sunday, with London Underground bosses and union officials unlikely to meet before then.
Following a strike on New Year's Eve, the RMT says 4,000 of its members who work as Tube station staff will now strike for 24 hours, starting at 6.30pm this Sunday.