Let's get together for a drink and a bit of chit-chat in English.

We'll do our best to speak only in English as much as possible and we'll try not to be too grumpy, OK? 

We'll start at 5:30 pm and pack up when we feel like it. Feel free to come at whatever time you wish and leave when you have had enough of "Shakespeare's language" for a day. Don't come too late though; there may be no-one left around to welcome you. ;-)

PS Please don't forget to pay for your drink, as I sometimes do. ;-) 
PPS Know your limits. You are responsible for your own safety.