Best interval ride?

Just interested in what riders opinions are regarding the best interval ride as far structure is concerned, looking for something with clear instructions form ride leader…found a few good ones just interested in the ones I’ve missed
Cheers

The best ones I’ve found are from the JETT group.

Everyone follows the plan and the leaders and the group in general all seem very nice.

3R Volt \ Spark \ Pedalplay
INC Relentless do steady state and an interval ride

Plus there is the HotChillee ride on a Thursday, more of a tempo+ ride but a good workout as your Cat works as a group to catch the groups in front. Chase group ride rather than race.