Here in Florida, where is hot this time of year, I would just leave my bike here in the office (locked up in my actual office), catch a ride with someone else to the venue then Uber/Lyft back to the office. If it's closer to home, I go home first, get ready and either drive the family jeep or get a ride another way (Uber/Lyft) from there. We have no public transport to speak of here.