Meetings in bars happened from time to time, but were considered somewhat dangerous—at least by the women. Colleges became co-ed, and young people were thrown together informally, making it easy to meet someone of the opposite sex. Instead of couples marrying in their early twenties, they married later.
Often men and women graduated college without yet entering into a serious, let alone permanent, relationship.
Similarly, during parts of the latter half of the 20 century, people once again began to use newspapers and magazines to make known their wishes to meet someone of the opposite sex.
These small blurbs appeared in the personals section.
The lesser problem was the concern that women had that they were endangering themselves meeting strangers about whom they knew very little. Stories circulated about women being lured to their deaths. Consequently, stratagems were developed to make such encounters somewhat safer, that is, refusal by the woman to give her home address, or even her telephone number.