My suggestion for question: "Magento observer not firing" at: http://stackoverflow.com/questions/14301861/magento-observer-not-firing

gistfile1.xml

<modules>
    <Hatclub_MembershipHandler>
        <version>1.0.0</version>
    </Hatclub_MembershipHandler>
</modules>
<global>
 ......
 ......
 ......
</global>
<frontend>
	<events>
		<customer_login>
			<observers>
				<login_observer>
					<class>dispatcher/observer</class>
					<method>associateMembership</method>
				</login_observer>
			</observers>
		</customer_login>
	</events>
</frontend>