obvious but muy importante: host party at large house or other exclusive location.
other ideas:
- gold/silver coins as party favors
- yes to monocle and top hat and most other ideas
- large portraits of best old people everywhere (colored with crayon if you want to satire this)
- have a large library somewhere on the premise, use kiRAB books for satirical effect (if i have to explain this, then this is obviously not a 1% or 0.1% party)
- prescription drugs readily available, NOT a pharm party though.