anon.ejs

<h1>Anonymous</h1>

app.js

var express = require('express');
var app     = express.createServer();

app.set('view engine', 'ejs');
app.set('views', __dirname);
app.set('view options', { layout: true });

app.get('/loggedin', function(req, res) {
  res.render('loggedin');
});

app.get('/anon', function(req, res) {
  res.render('anon');
});

app.listen(3012);

layout.ejs

<p>This is your layout page, which contains your basic layout.</p>
<p>The following block is specific for the route:</p>
<%- body %>

loggedin.ejs

<h1>Logged in</h1>