Single sorts, and the letters dropped from pairs in the theme answers

• Not exactly social butterflies
• They don't mix well
• Antisocial ones
• Hardly partygoers
• "Table for one" folks
• Eremites
• Hardly social butterflies
• Hermits, e.g

Wiktionary Word definitions in Wiktionary
n. (plural of loner English)

Wikipedia Word definitions in Wikipedia
' Samotáři ' (Loners) is a 2000 Czech comedy film directed by David Ondříček . Actor Jiří Macháček won the Czech Lion Award for Best Actor in a supporting role in 2001 for his part in the movie, and the film was nominated in nine other categories, including ...