Lunchtime is always problematic.
Tuesday is SecDir lunch for a lot of the security folk. Wednesday is working group chair training for chairs and secretaries. Thursday lunch speaker series.
Evenings are almost as bad. Today could have been OK (can still be…) but tomorrow is social event, wednesday there’s the plenary, and some may skip out, but you could set something up for after that (I will miss it, but still…). Thursday evening could be OK.