Up until the Free Speech Movement won an end to many of the UC administration's restrictions on student political activity, the only place that literature and recruiting tables could be set up was at Bancroft and Telegraph Avenues, which was not on University Property.
Here are a few photographs showing the tables of various student organizations. After the FSM's victories, several areas on campus were designated for tables and leaflet distribution, with permits required (a provision not always enforced).
1962 - Bancroft and Telegraph, informational material and signups for the SLATE summer conference
Late 1960s, tables permitted on campus. An impressive lineup in front of the Student Union
Like to argue? -- nothing thing like a good impromptu debate
1968 Mexican-American Students Association table
Information table during the 1966 student strike over restrictions on on-campus political activity.