I've sat through people doing twenty mins of one liners
That can be deadly boring, but some people do it well. Tim Vine, for instance. There's an art to building links and themes between the gags and bringing the audience with you.
I could watch endless Tim Vine/Milton Jones/Stewart Francis. Their stuff can get repetitive after watching a few shows but given their jokes/time vs other types of stand-up it's pretty forgivable IMO
That can be deadly boring, but some people do it well. Tim Vine, for instance. There's an art to building links and themes between the gags and bringing the audience with you.