There’s always a solo female who is finding herself, or already found herself and needs no man. These women can be hard to distinguish from the crowd because they make friends ridiculously fast. They might as well stamp “talk to me” on their foreheads because if they aren’t talking to the couple on their honeymoon or the seasoned vacationers they could be confused as a local who is chatting it up with the bartender.
The solo male travelers are a little easier to pick out. They typically will say they are at the location for a specific reason (think hiking, climbing, road trips) and usually won’t strike up a conversation unless talked to first.
Both of these solo travelers are likely to have a dog and an active travel blog.
There are also solo travelers who are there for business. Look for a laptop, coffee, headphones, and business casual attire. They probably don’t want to talk to you.