1)...No booze
2)...Dead flat
3)...Poor weather
Sounds like the mighty Oxford Aviation Training's former CPL training base, Tyler, Texas, USA.
However,
1)...we still got pi$$ed (even in a 'dry' county plus a 40 mile round trip to the nearest liquor shop)
2)...We could all navigate to a nameless Oil Refinery within 3 seconds of our eta.
and...3)...Despite being based in "Tornado Alley", the most turbulent part of the USA, we could all hold our altitude and heading to precise and exacting standards even though the updraughts were incredible on some days.