Clubs
| Name | Short name | Club type |
|---|---|---|
| Senior United Service Club | Senior United Service | Social |
| Service Club | Service | Social |
| Shropshire County Club | Shropshire County | Social |
| Smeaton Club | Smeaton | Social |
| Somerset County Club | Somerset County | Social |
| Special Forces Club | Special Forces | Social |
| Sporting Club | Sporting | Sporting |
| Sports and Public Schools Club | Sports & Public Schools | Social |
| Sports Club | Sports | Sporting |
| Stafford Street Club | Stafford Street | Social |
| St Andrew's Club | St Andrews | Social |
| St George's Club | St George's | Social |
| Stirling County Club | Stirling County | Social |
| St James's Club | St James's | Social |
| St Stephen's Club | St Stephen's | Social |
| St Stephen's Green | St Stephen's Green | Social |
| Surrey Conservative Club | Surrey Conservative | Political |
| Sword Club | Sword | Sporting |
| Thatched House Club | Thatched House | Social |
| Trade Union Club | Trade Union | Social |
| Travellers' Club | Travellers | Social |
| Turf Club | Turf | Social |
| Ulster Club, Belfast | Ulster, Belfast | Social |
| Ulster Liberal Club, Belfast | Ulster Liberal, Belfast | Political |
| Union Club | Union | Social |