Not necessarily. I've often found that if I set by myself for long enough at parties then usually someone will come along and start a conversation. And I'm male and not remotely attractive. The trick is to sit somewhere it it doesn't look like your awkwardly not joining in, but purposely choosing to be.

After reading this sentence I just wanted to comment here that the article seems to be written very much from a female POV. As a lone guy, surely people won't "beeline towards you". It requires a lot more effort and initiative.