Mainstream cruise ships' policies vary widely, so if you want to cruise, check their single rates and policies. Sometimes it doesn't matter if you're alone. Thirty percent of participants are single and two thirds of those are women. Elderhostel sends people ages 55 and older all over the world for one to three weeks of classroom instruction, field trips and sightseeing. University dorms, state park lodges and other accommodations often include both single and double rooms.
Nobody feels alone as the joint activities draw everyone together.
The organization forms caravans of RVs operated by singles, and holds rallies and campouts all over the country. There is a charge to join. Couples and singles mingle in shared experiences. Many volunteers are single seniors. The deals and adventures include many ideas for singles.