You probably know about the possibility to tag scenarios in Cucumber to run your own piece of code before the actual scenario is run which looks like that:

@foo
Scenario: Do something
...

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and you place the following snippet into support/env.rb:

Before('@foo') do
  puts "This is run every time a @foo tagged scenario is hit"
end    

You can tag RSpec examples like this:

it 'does something', :foo => true do
  ...
end

What you need is the following within the RSpec.configure do |config| block within spec_helper.rb

config.before(:each, :foo => true) do
  puts "This is run every time a tagged rspec example is hit"
end