Minecraft ideas for survival city world buildings xbox 360?

Pretty much the topic me and a couple of friends have built a relatively big world all in survival. With a currency system and we need ideas what to build next heres what we have.
a bank
town hall
a nightclub
a black market a bakery a doctors lab
rail tracks to all the biomes
the biggest wheat farm we have seen made on survival
10 houses
an end fortress for vips
notice board
lamp posts
pig car rental company
ways to get on a rail and when pigs fly
a jail
half made spleef arena
snow farm
walls all around the city
a redstone island to practice redstone
meeting hall
and a lot of creeper holes

please remember this was done on survival so keep ideas reasonable and any ideas will be considered

Underground tunnels connecting everything. But ones that also go the wrong way and can set off creepers etc.

And traps, and tracks for faster getting around.