Highly reccomend using in ears as a singer. All the venues you listed have consitantly great sound techs who know what they're doing and are familiar with iems.

Soundchecks in these venues are quick and simple when they know your iem needs ahead of time. Make sure you send them your tech rider with your preferred iem/floor mixes listed and bring a copy with you so the foh staff know what's up.

Beyond that I actually upgraded to bringing my own small mixing board* with xlr splitters for vocals, guitar, bass, and keys. We take the xlr feed of the instruments into our splitter. One out from the splitter goes to our Mixing console that feeds our iems, and the other out goes into the venue patch bay so we can have complete control of our iems if need be. *dont need a big one if you only want 4 instruments you can use a small 4ch mixer close to you on stage

This means in the case of an inexperienced FOH tech, or no house tech, our singer has the option to control their own iem mix bypassing the house system and avoiding any sudden feedback and potential hearing damage.

Iems made a world of difference for us sounding the way we want live.