Jujamcyn: 3/5 houses (Kerr,O'Neill and St James) Can easily say they have some of the nicest and organized staff. Efficient with lines, helpful with seating and pleasant to make small talk with.
Nederlander: 5/9 houses (Gershwin, Lunt-Fontanne, Marquis, Neil Simon and Palace) While the staff is usually pleasant, unfortunately it affects their organization and efficiency. Lines were long and not organized. However they are usually quick to catch any distractions during peformances such as phones.
Shubert: 7/18 houses (Broadhurst, Broadway, Imperial, Majestic, Music Box, Neil Simon and Winter Garden) Most efficient at lines, sales and seating. Unfortunately their rush to get everything done in a timely and organized manner can result in rude staff. For the most part staff are warm but there's always one or two at each theatre that are just cold and condescending towards the patrons they are attending to.
Roundabout houses I haven't been in yet, hope to change that in the near future.